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=DUV Resist=
=DUV Resist=
{{:Specific Process Knowledge/Lithography/DUVStepperLithography|Process information}}
{{:Specific_Process_Knowledge/Lithography/DUVStepperLithography|S.C3.9CSS_Spinner-Stepper}}


=E-beam Resist=
=E-beam Resist=


=Imprint Resist=
=Imprint Resist=

Revision as of 14:48, 26 January 2023

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This section is under construction

UV Resist

UV resist comparison table

Comparison of specifications and feature space of the standard UV photoresists available at DTU Nanolab.

Resist AZ 5214E AZ MiR 701 AZ nLOF 2020 AZ 4562 SU-8 TI Spray
Resist tone
  • Positive
  • Negative (image reversal)
Positive Negative Positive Negative
  • Positive
  • Negative (image reversal)
Thickness range 1.5 - 4.2 µm 1.5 - 4 µm 1.5 - 4 µm 5 - 10 µm 1 - 200 µm 0.5 - 5 µm
Coating tool

Automatic spin coaters:

  • Spin coater: Gamma UV lithography
  • Spin coater: Gamma E-beam & UV

Manual spin coaters:

  • Spin coater: Labspin 02
  • Spin coater: Labspin 03
  • Spin coater: RCD8

Spray coater

Automatic spin coaters:

  • Spin coater: Gamma UV lithography
  • Spin coater: Gamma E-beam & UV

Manual spin coaters:

  • Spin coater: Labspin 02
  • Spin coater: Labspin 03
  • Spin coater: RCD8

Spray coater

Automatic spin coaters:

  • Spin coater: Gamma UV lithography

Manual spin coaters:

  • Spin coater: Labspin 02
  • Spin coater: Labspin 03
  • Spin coater: RCD8

Spray coater

Automatic spin coaters:

  • Spin coater: Gamma E-beam & UV

Manual spin coaters:

  • Spin coater: Labspin 02
  • Spin coater: Labspin 03
  • Spin coater: RCD8

Manual spin coaters:

  • Spin coater: Labspin 02
  • Spin coater: Labspin 03
  • Spin coater: RCD8

Spray coater

Spectral sensitivity 310 - 420 nm 310 - 445 nm 310 - 380 nm 310 - 445 nm 300 - 375 nm 310 - 440 nm
Exposure tool
  • Maskless aligners
  • Mask aligners
  • Maskless aligners
  • Mask aligners
  • Maskless aligners
  • Mask aligners
  • Maskless aligners
  • Mask aligners
  • Maskless aligners
  • Mask aligners
  • Maskless aligners
  • Mask aligners
Developer
  • AZ 726 MIF (2.38% TMAH)
  • AZ 351 B (NaOH)
  • AZ 726 MIF (2.38% TMAH)
  • AZ 351 B (NaOH)

AZ 726 MIF (2.38% TMAH)

mr-DEV 600 (PGMEA)

AZ 726 MIF (2.38% TMAH)

Development rinse agent DIW DIW DIW DIW IPA DIW
Remover
  • Acetone
  • Remover 1165 (NMP)
  • Acetone
  • Remover 1165 (NMP)
  • Acetone
  • Remover 1165 (NMP)

Remover 1165 (NMP)

  • Cross-linked SU-8 is practically insoluble
  • Oxygen plasma ashing can remove cross-linked SU-8
  • Acetone
  • Remover 1165 (NMP)
Comments Good adhesion for wet etch High selectivity for dry etch Negative sidewalls for lift-off For processes with resist thickness between 6 µm and 25 µm
  • High aspect ratio
  • Resist thickness 1 µm to hundreds of µm
  • Available in cleanroom: 2005, 2035, and 2075. Considering discontinuation of the SU-8 2000 series we need to move to another product SU8 3000 and SU8 XTF series.
  • New formulation will be available in cleanroom and tested: 3005 instead of 2005, 3035 instead of 2035, XTF75 instead of 2075 and new 3025.
TI spray resist is an image reversal resist, similar to AZ 5214E. The process flow will be similar to the process flows for 5214, except for the coating step. The exposure dose and development will depend on the specific process.


Process flow examples

Comparison of specifications and feature space of the standard UV photoresists available at DTU Nanolab. These are just examples and may contain obsolete information regarding exposure dose, etc.

Resist AZ 5214E AZ MIR 701 AZ nLOF 2020 AZ 4562 SU-8 Ti Spray
Maskless aligner

Process flow AZ MiR 701‎ MLA

Process flow AZ nLOF 2020‎ MLA‎

Process flow AZ 4562 MLA

Process flow SU-8 MLA‎

NB! Most of the process knowledge about SU-8 is based in research groups

Mask aligner

Process flow AZ MiR 701‎ MA6

Process flow AZ nLOF 2020‎ MA6‎

Process flow AZ 4562 MA6‎

Process flow SU-8 MA6‎

NB! Most of the process knowledge about SU-8 is based in research groups

Other process flows: Chip on carrier: A procedure for UV lithography on a chip using automatic coater and developer.


Exposure dose

Spectral sensitivity of AZ resists represented as optical absorption coefficient.

During exposure of the resist, the photoinitiator, or photo-active component, reacts with the exposure light, and starts the reaction which makes the resist develop in the developer.

In a positive resist, it makes the resist become soluble in the developer. In a negative resist, usually assisted by thermal energy in the post-exposure bake (PEB), it makes the resist insoluble in the developer. The amount of light required to fully develop the resist in the development process, is the exposure dose.

The optimal exposure dose is a function of many parameters, including the type of resist, the resist thickness, and the sensitivity of the resist.

Resist sensitivity
The resist sensitivity is a measure of how efficiently it reacts to the exposure light. Spectral sensitivity is the sensitivity of the resist as a function of wavelength. It is usually given simply as the range from the wavelength below which absorption in the resist material makes lithography impractical to the wavelength at which the photoinitiator is no longer efficiently activated.

Within the sensitivity range, the optical absorption is commonly used as a measure of sensitivity. A high absorption coefficient signifies a high sensitivity, as the light is absorbed by the photoinitiator. Because of spectral sensitivity, the optimal dose of a given resist type and thickness is also a function of the spectral distribution of the exposure light, i.e. the equipment used for the exposure. Using a combination of experience, calculation and assumptions, it may be possible to estimate the dose for an exposure equipment, if the exposure dose is already known on another equipment.

Due to reflection and refraction at the interface between the resist and the substrate, the optimal dose may also be a function of the type of substrate used. Unless otherwise stated, the exposure doses given below are for standard silicon wafers.

Apart from the already mentioned factors, the optimal dose also depends on the developer chemistry and the parameters used in the development process. Finally, the requirements to the lithographic process in terms of resolution, bias (line broadening), etch selectivity, side wall angle, etc. may narrow down, or widen, the process window. The exposure doses given in the sections below should be used as a starting point for individual fabrication process development.

Due to the process of bleaching, where the absorption of the resist changes during exposure, the exposure dose is unfortunately not always constant at different intensities of the exposure light. The exposure time is thus not always a linear function of the exposure intensity.

Calculate exposure time

In the maskless aligners, the dose is set directly as a process parameter in the job. In mask aligners, on the other hand, the parameter that is set is the exposure time, i.e. how long the shutter is open during the exposure.

The exposure dose, D [J/m2], in terms if exposure light intensity I [W/m2] and exposure time t [s], is given by:

D=It

Since the intensity is specific to the spectral sensitivity of the sensor used to measure the exposure light, and the exposure time is specific to the spectral distribution of the exposure light (cf. spectral sensitivity), this dose is specific to the combination of exposure source and optical sensor.

Given an exposure dose, the exposure time, t, is calculated as:

t=DI1

It is important to keep in mind that this exposure time is valid only for a specific combination of exposure source and optical sensor, as well as for a specific development process.

Exposure dose for mask aligners

The exposure doses listed below are for generic good exposure results, and can be a compromise between getting good lines, as well as good dots, in both clear field and dark field exposures. The optimal dose for any given specific project, could be different from the listed values.

All doses are for standard silicon wafers, unless otherwise stated. Development is done using 2.38% TMAH (AZ 726 MIF).


Aligner: MA6-1

The Aligner: MA6-1 has an i-line notch filter installed. This produces an exposure light peak around 365 nm with a FWHM of 7 nm.

Quality control
Please note that the values listed in the table are not routinely tested as part of quality control.

Date Operator Film thickness Exposure mode Dose Resolution Comments
AZ MIR 701 Long ago ? 1.5 µm ? 180 mJ/cm2 ? µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ MIR 701 Long ago ? 2.0 µm ? 200 mJ/cm2 ? µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ MIR 701 Long ago ? 4.0 µm ? 400 mJ/cm2 ? µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ 5214E Long ago ? 1.5 µm ? 72 mJ/cm2 ? µm Not under regular quality control

Development: 60 s puddle
AZ 5214E Long ago ? 2.2 µm ? 80 mJ/cm2 ? µm Not under regular quality control

Development: 60 s puddle
AZ 5214E Long ago ? 4.2 µm ? 160 mJ/cm2 ? µm Not under regular quality control

Development: 60 s puddle
AZ 5214E
Image reversal
Long ago ? 2.2 µm ? ? mJ/cm2 ? µm Not under regular quality control

Reversal bake: 60 s @ 110°C
Flood exposure: 500 mJ/cm2
Development: 60 s puddle
AZ nLOF 2020 Long ago ? 2.0 µm ? 121 mJ/cm2 ? µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle

Side wall angle: ~15°
For smaller angle (~5°): develop 30 seconds instead
AZ 4562 Long ago ? 10 µm ? 510 mJ/cm2 ≤5 µm Not under regular quality control

Priming: HMDS
Rehydration after SB: none
Exposure: Multiple exposures with 15 s pauses is recommended
Degassing after exposure: none
Development: 5 x 60 s multi puddle

New resists version in 2023
As of 2023-03-21 we no longer have any of the old versions of the resists: AZ 5214E, AZ 4562, AZ MiR 701. This table contains only information about the old resist versions.


Aligner: MA6-2

The Aligner: MA6-2 has an i-line notch filter installed. This produces an exposure light peak around 365 nm with a FWHM of 7 nm.

Quality control
Please note that the values listed in the table are not routinely tested as part of quality control.

Date Operator Film thickness Exposure mode Dose Resolution Comments
AZ MIR 701 2023-09-26 taran 1.5 µm Hard contact 150 mJ/cm2 ? µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ 5214E 2025-09-30 jehem 1.5 µm Hard contact 90 mJ/cm2 1.5 µm Not under regular quality control

Development: 60 s puddle
AZ 5214E
Image reversal
2023-01-11 jehem 2.2 µm Hard contact 22 mJ/cm2 2.0 µm Not under regular quality control

Reversal bake: 60 s @ 110°C
Flood exposure: 500 mJ/cm2
Development: 60 s puddle
AZ nLOF 2020 2023-09-26 taran 2.0 µm Hard contact 121 mJ/cm2 ? µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ 4562 2021-12-08 jehem 10 µm Soft contact 550 mJ/cm2 ≤5 µm Not under regular quality control

Priming: HMDS
Rehydration after SB: none
Exposure: Single exposure
Degassing after exposure: none
Development: 5 x 60 s multi puddle

New resists version in 2023
As of 2023-03-21 we no longer have any of the old versions of the resists: AZ 5214E, AZ 4562, AZ MiR 701. This table contains only information about the new resist versions.


Exposure dose for maskless aligners

The exposure doses listed below are for generic good exposure results, and can be a compromise between getting good lines, as well as good dots, in both clear field and dark field exposures. The optimal dose and achievable resolution for any given specific project, could be different from the listed values.

All doses are for standard silicon wafers, unless otherwise stated. Development is done using 2.38% TMAH (AZ 726 MIF).


Aligner: Maskless 01

The Aligner: Maskless 01 has a 365 nm laser light source with a FWHM of ~1 nm. The test exposures on this tool were made using the pneumatic autofocus system.

Quality control
Please note that the values listed in the table are not routinely tested as part of quality control, except for the resist AZ 5214E.

Date Operator Film thickness Exposure mode Dose Defoc Resolution Comments
AZ MIR 701 2025-10-16 jehem 1.5 µm Fast 325 mJ/cm2 -1 1.5 µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle

Tested using dehydration reducing measures
AZ 5214E 2025-08-15 taran 1.5 µm Fast 110 mJ/cm2 -1 1.75 µm See QC data for latest values

Development: 60 s puddle
AZ 5214E
Image reversal
2023-04-05 jehem 2.2 µm Fast 20 mJ/cm2
possibly incorrect data
-2
possibly incorrect data
2.0 µm Not under regular quality control

Reversal bake: 60 s @ 110°C
Flood exposure: 500 mJ/cm2
Development: 60 s puddle
AZ nLOF 2020 2023-07-06 jehem 2.0 µm Fast 180 mJ/cm2 0 1.5 µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ 4562 2023-04-05 jehem 10 µm Fast 1050 mJ/cm2
possibly incorrect data
-1
possibly incorrect data
≤5 µm Not under regular quality control

Priming: HMDS
Rehydration after SB: none
Exposure: Single exposure
Degassing after exposure: none
Development: 5 x 60 s multi puddle

New resists version in 2023
As of 2023-03-21 we no longer have any of the old versions of the resists: AZ 5214E, AZ 4562, AZ MiR 701. This table contains only information about the new resist versions.

Dehydration reducing measures used for testing AZ MiR 701:
The CDA used for the pneumatic autofocus will dehydrate the resist. To reduce this effect, the writehead is parked far away from the write area while setting up the job for at least a few minutes, before starting the exposure.


Aligner: Maskless 02

The Aligner: Maskless 02 has a 375 nm laser light source with a FWHM of ~1 nm. The test exposures on this tool were made using the optical autofocus system, unless otherwise specified.

Quality control
Please note that the values listed in the table are not routinely tested as part of quality control, except for the resist AZ 5214E.

Date Operator Film thickness Exposure mode Dose Defoc Resolution Comments
AZ MIR 701 2023-08-21 taran 1.5 µm Quality 325 mJ/cm2 1 1 µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle

Tested using dehydration reducing measures
AZ 5214E 2024-12-09 taran 1.5 µm Quality 100 mJ/cm2 2 1.5 µm See QC data for latest values

Development: 60 s puddle
AZ 5214E
Image reversal
2023-04-17 jehem 2.2 µm Quality 35 mJ/cm2 0 1.5 µm Not under regular quality control

Reversal bake: 60 s @ 110°C
Flood exposure: 500 mJ/cm2
Development: 60 s puddle
AZ nLOF 2020 2023-08-21 taran 2.0 µm Quality 450 mJ/cm2 0 1.5 µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle
AZ 4562 2023-04-19 jehem 10 µm Quality 1150 mJ/cm2 0 ≤5 µm Not under regular quality control

Priming: HMDS
Rehydration after SB: none
Exposure: Single exposure
Degassing after exposure: none
Development: 5 x 60 s multi puddle

New writehead
As of 2023-03-21 the MLA2 has a new writehead installed, converting it from a write mode 1 tool to a write mode 2 tool. This makes all previous dose/defocus settings obsolete. This table contains only the dose/defocus values for the new writehead.

New resists version in 2023
As of 2023-03-21 we no longer have any of the old versions of the resists: AZ 5214E, AZ 4562, AZ MiR 701. This table contains only information about the new resist versions.

Dehydration reducing measures used for testing AZ MiR 701:
The CDA used for the pneumatic autofocus will dehydrate the resist. To reduce this effect, the writehead is parked far away from the write area while setting up the job for at least a few minutes, before starting the exposure.


Aligner: Maskless 03

The Aligner: Maskless 03 has a 405 nm laser light source with a FWHM of ~1 nm. The test exposures on this tool were made using the pneumatic autofocus system.

Quality control
Please note that the values listed in the table are not routinely tested as part of quality control, except for the resist AZ 5214E.

Date Operator Film thickness Exposure mode Dose Defoc Resolution Comments
AZ MIR 701 2025-10-20 jehem 1.5 µm Quality 175 mJ/cm2 -1 1 µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle

Tested using dehydration reducing measures
AZ 5214E 2025-09-02 taran 1.5 µm Quality 75 mJ/cm2 1 1 µm See QC data for latest values

Development: 60 s puddle
AZ 5214E
Image reversal
2023-06-30 jehem 2.2 µm Quality 50 mJ/cm2 0 1 µm Not under regular quality control

Reversal bake: 60 s @ 110°C
Flood exposure: 500 mJ/cm2
Development: 60 s puddle
AZ nLOF 2020 2023-06-30 jehem 2 µm Quality 9000 mJ/cm2 2 1 µm Not under regular quality control

Post exposure bake: 60 s @ 110°C
Development: 60 s puddle

Due to the high dose required on this tool, it is recommended to process nLOF on tools with a more appropriate exposure light source
AZ 4562 2023-06-30 jehem 10 µm Quality 550 mJ/cm2 3 ≤5 µm Not under regular quality control

Priming: HMDS
Rehydration after SB: none
Exposure: Single exposure
Degassing after exposure: none
Development: 5 x 60 s multi puddle

New resists version in 2023
As of 2023-03-21 we no longer have any of the old versions of the resists: AZ 5214E, AZ 4562, AZ MiR 701. This table contains only information about the new resist versions.

Dehydration reducing measures used for testing AZ MiR 701:
The CDA used for the pneumatic autofocus will dehydrate the resist. To reduce this effect, the writehead is parked far away from the write area while setting up the job for at least a few minutes, before starting the exposure.


Exposure dose when using AZ 351B developer (NaOH)

The exposure doses listed below are for generic good exposure results, and can be a compromise between getting good lines, as well as good dots, in both clear field and dark field exposures. The optimal dose for any given specific project, could be different from the listed values.

All doses are for standard silicon wafers, unless otherwise stated. Development is done using AZ 351B developer (NaOH) diluted 1:5.


Aligner: MA6-1

The Aligner: MA6-1 has an i-line notch filter installed. This produces an exposure light peak around 365 nm with a FWHM of 7 nm.

Quality control
Please note that the values listed in the table are not routinely tested as part of quality control.

Date Operator Film thickness Exposure mode Dose Resolution Comments
AZ 5214E Long ago ? 1.5 µm ? 70 mJ/cm2 ? µm Not under regular quality control

Development: 60 s submersion
AZ 5214E Long ago ? 2.2 µm ? 72 mJ/cm2 ? µm Not under regular quality control

Development: 70 s submersion
AZ 5214E Long ago ? 4.2 µm ? 160 mJ/cm2 ? µm Not under regular quality control

Development: 180 s submersion
AZ 5214E
Image reversal
Long ago ? 1.5 µm ? 30 mJ/cm2 ? µm Not under regular quality control

Reversal bake: 100 s @ 110°C
Flood exposure: 210 mJ/cm2
Development: 60 s submersion
AZ 5214E
Image reversal
Long ago ? 2.2 µm ? 35 mJ/cm2 ? µm Not under regular quality control

Reversal bake: 100 s @ 110°C
Flood exposure: 210 mJ/cm2
Development: 70 s submersion
AZ 4562 Long ago ? 10 µm ? 320 mJ/cm2 ? µm Not under regular quality control

Priming: HMDS
Rehydration after SB: none
Exposure: Multiple exposures with 15 s pauses is recommended
Degassing after exposure: none
Development: 300 s submersion

New resists version in 2023
As of 2023-03-21 we no longer have any of the old versions of the resists: AZ 5214E, AZ 4562, AZ MiR 701. This table contains only information about the old resist versions.


DUV Resist

The content on this page, including all images and pictures, was created by DTU Nanolab staff, unless otherwise stated.

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Spin coater: Süss stepper

The SÜSS Spinner-Stepper is placed in F-3

This spinner is dedicated for spinning DUV resists. The spinner is fully automatic and can run up to 25 substrates in a batch 4", 6", and 8" size (8" requires tool change). The machine is equipped with the 3 resist lines (DUV42S-6, KRF M230Y, and KRF M35G), as well as a syringe dispense system.

The user manual, quality control procedures and results, user APVs, and contact information can be found in LabManager:

Equipment info in LabManager - requires login

DUV resist overview

The spinning process will be performed by the customer together with the Photolith group of Nanolab. In case you would like to do DUV lithography, please contact Lithography team, who will consult you and run your wafers together with you.


Bottom Anti Reflection Coating (BARC):


Positive DUV resist for spin coating in 600-300nm thickness range:


Positive DUV resist for spin coating in 1600-800nm thickness range:


Negative DUV resist for spin coating in 1400-800nm or diluted with EC Solvent in 1:1 in 400-200nm thickness range:

Process information

Equipment performance and process related parameters

Purpose
  • Spin coating and soft baking of BARC
  • Spin coating and soft baking of DUV resists
  • Post exposure baking
Resist
  • BARC DUV42S-6
  • Positive tone resist KRF M230Y
  • Positive tone resist KRF M35G
  • Negative tone resist UVN2300-0.8
Performance Coating thickness
  • BARC DUV42S-6 60-90nm
  • Positive tone resist KRF M230Y 300-600nm
  • Positive tone resist KRF M35G 800-1600nm
  • Negative tone resist UVN2300-0.8 200-1400nm
Process parameters Spin speed

  10 - 5000 rpm

Spin acceleration

  100 - 10000 rpm/s

Hotplate temperature
  • 175°C for BARC baking
  • 130°C for positive tone resist soft baking and post exposure baking
  • 100°C for negative tone resist soft baking and post exposure baking
Substrates Substrate size
  • 100 mm wafers
  • 150 mm wafers
  • 200 mm wafers (requires tool change)
Allowed materials
  • Any standard cleanroom material
Batch

  1 - 25


DUV Stepper

DUV Stepper is placed in F-3

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The deep-UV stepper FPA-3000EX4 from Canon is an advanced exposure system designed for mass-production of 6 and 8 inch wafers/ devices having a throughput of up to 90 wafers per hour. The largest applicable thickness of the wafers/ devices is 1,2 mm. Also 4" wafers/ devices can be processed with some restrictions concerning throughput, resolution, uniformity and maximum allowed wafer thickness. The system is equipped with a KrF Excimer laser from Cymer (wavelength 248 nm). Its projection lens’ NA is variable over a range between 0,4 and 0,6. Additionally, the partial coherence factor (σ) of the illumination system can be adjusted and different off-axis illumination modes can be selected.

The critical dimension (CD) of patterns that can be realized is specified at around 250nm for arbitrary formed patterns in the standard illumination mode (NA=0,6; σ =0,65). However, the best achievable resolution is different for each pattern type, pattern shape and pitch. So linewidths down to 160 nm could be achieved for geometrically simple patterns or pattern arrays (single and multiple line or pin-hole structures).


The user manual(s), quality control procedure(s) and results and contact information can be found in LabManager.

Process information

Equipment performance and process related parameters

Purpose

Exposure system designed for mass/production of devices with linewidth down to 250nm

Specifications Magnification

1:5

Projection lens Numerical Aperture

0,4 - 0,60

Illumination system's σ

0,2 - 0,75 (standard illumination mode: σ = 0,65)

Exposure source

KrF laser

Wavelength

248nm

Illumination intensity

2800 W/m2

Illumination uniformity

1,2%

Maximum printed field size

22 x 26 mm (maximum on wafer)

Alignment accuracy

3 sigma = 50 nm

Substrates Substrate size
  • 100 mm wafers (in trays)
  • 150 mm wafers
  • 200 mm wafers (requires tool change)
Allowed materials
  • Any standard cleanroom material
Batch

1 - 25


Developer: TMAH Stepper

The Developer-TMAH-Stepper is placed in F-3.

This developer is dedicated for development of DUV resists. The developer is fully automatic and can run up to 25 substrates in a batch 4", 6", and 8" size (8" requires tool change). The machine is equipped with 1 developer line, in our case 2,38% TMAH in water (AZ 726 MIF), 1 topside rinse line with water, 1 backside rinse line with water and 1 N2 line for drying.


The user manual and contact information can be found in LabManager - requires login


Process information

The SEM picture of 250 nm pillars and lines. Exposure dose is 140 J/m2.

The development process will be performed by the customer together with the Photolith group of DTU Nanolab. In case you would like to do DUV lithography please contact Lithography team, who will consult you and run your wafers together with you.

Here you can find a chart‎ demonstrating a dependence between 250 nm line width/pillars diameter and exposure dose.

Standard processes

Post-exposure bake sequences:

  • (1000) DCH PEB 130C 60s 60s baking at 130°C; 20s cooling
  • (1001) DCH PEB 130C 90s 90s baking at 130°C; 20s cooling

Development sequences:

  • (1004) DCH DEV 60s 60s single puddle development

Combined PEB and development sequences:

  • (1002) DCH PEB_60s and DEV_60s 60s baking at 130°C followed by 60s single puddle development
  • (1003) DCH PEB_90s and DEV_60s 90s baking at 130°C followed by 60s single puddle development

The standard developer process consists of:

  • pre-wetting with water (2.5s @ 1000rpm)
  • developer dispense (2.5s @ 40rpm, corresponding to ~9ml)
  • development (60s @ 0rpm)
  • water rinse with BSR (5s @ 3000rpm)
  • nitrogen drying (7s @ 4000rpm)

and has a cycle time of ~2 minutes


Equipment performance and process related parameters

Purpose

Development of DUV resist: KRF M230Y and KRF M35G

Developer

2,38% water based TMAH

Process parameters Spin speed

10 - 5000 rpm

Spin acceleration

100 - 10000 rpm/s

Hotplate temperature

130°C for post exposure baking

Substrates Substrate size
  • 100 mm wafers
  • 150 mm wafers
  • 200 mm wafers (requires tool change)
Allowed materials
  • Any standard cleanroom material
Batch

1 - 25


E-beam Resist

Imprint Resist