View source for Specific Process Knowledge/Wafer and sample drying

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=Drying Comparison Table=

{| border="2" cellspacing="0" cellpadding="2" 

|-style="background:lightgray; color:black"
!Equipment 

|[[Specific_Process_Knowledge/Wafer_and_sample_drying #Spin dryers|Spin dryer 2]]
|[[Specific_Process_Knowledge/Wafer_and_sample_drying #Spin dryers|Spin dryer 3]]
|[[Specific_Process_Knowledge/Wafer_and_sample_drying #Spin dryers|Spin dryer 4]]
|[[Specific_Process_Knowledge/Wafer_and_sample_drying #Spin dryers|Spin dryer 5]]
|[[Specific_Process_Knowledge/Wafer_and_sample_drying/Critical Point Dryer|Critical point dryer]]
|[[Specific_Process_Knowledge/Wafer_and_sample_drying #Ethanol fume dryer|Ethanol fume dryer]]
|[[Specific_Process_Knowledge/Wafer_and_sample_drying #Nitrogen guns|N<sub>2</sub> guns]]
|-

|-style="background:WhiteSmoke; color:black"
!Location
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*B-1
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*D-3
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*D-3
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*F-3
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*D-3
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*C-1
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*In fumehoods and at chemical benches
|-

|-style="background:lightgray; color:black"
!Purpose 
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*Drying  
|
*Drying
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*Drying
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*Drying
*Rinsing + drying
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*Drying sensitive samples. E.g. with cantilevers
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*Drying sensitive samples. E.g. with cantilevers
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*Drying all kind of samples.
|-

|-style="background:WhiteSmoke; color:black"
!Batch size
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*1-25 100 mm wafers
*1-25 150 mm wafers
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*1-25 100 mm wafers
*1-25 150 mm wafers
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*1-25 100 mm wafers
*1-25 150 mm wafers
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*1-25 100 mm wafers
*1-25 150 mm wafers
*1-25 200 mm wafers 
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*1 to 5 wafers per run. Sizes: 2”, 4" or 6"
* Pieces (up to 10x10mm)
|
*1-25 50 mm wafers
*1-25 100 mm wafers
*Pieces if a suitable carrier is available
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*One sample at a time
|-

|-style="background:lightgray; color:black"
!Allowed materials
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*Only for RCA cleaned wafers
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*No restrictions
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*No restrictions
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*No restrictions
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*Si,SiO2, Si3N4
*Quartz and Pyrex
*InAlP, GaAs
*SU8
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*No restriction except for polymers
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*No restriction
|- 
|}

= Spin dryers =

A tool used for drying wafers.
A single cassette of wafers is placed in a stainless steel rotor. The wafers are centered just off the axis of rotation, and rotated at high RPM so that centrifugal force “locks” the wafers in place.

Some of the tools have DI water connected, and can be used for both rinsing and drying of wafers, while other tools do not and can only be used for drying.
All wafers have to be washed in a wetbench cleaning station before going into the spin dryer, regardless of using the rinse function or not.


'''The user manual, technical information, and contact information can be found in LabManager: [http://labmanager.danchip.dtu.dk/function.php?module=Machine&view=view&mach=157 Spin dryer 2] [http://labmanager.danchip.dtu.dk/function.php?module=Machine&view=view&mach=158 Spin dryer 3]'''


== Process information ==

Standard process is:
#Rinse (with DI water) for 60 seconds at 500 RPM
#Dry with nitrogen for 150 seconds at 1800 RPM
#Dry with nitrogen and anti-static purge for 30 seconds at 1800 RPM


<gallery caption="Different places to dry your wafers" widths="275px" heights="225px" perrow="5"> 
image:Spin_dryer_2ny.jpg|Spin dryer 2 for RCA cleaned wafers only in B-1. Can take 4" wafers (top) and 6" wafers (bottom).
image:Spin_dryer_3.jpg|Spin dryer 3 for 4" wafers (top) and 6" wafers (bottom) in D-3. 
image:Spin_dryer_5.JPG|Spin dryer 5 for 8", 6" and 4" wafers in the same chamber, with different carrier holders.
</gallery>

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= Ethanol fume dryer =

If your wafers are fragile or having thin membranes, cantilevers or suspended bridges that risk to stick or adhere to the surface it can be a good idea to dry your wafers in the ethanol fume dryer. Ethanol is heated to 70°C and your wafers are placed in the fumes of Ethanol which will make the water evaporate from the surface.
The Ethanol dryer is placed on a shelf or trolly in D-3 and looks like a US bath. Describtion on how to use is written on the bath.


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= Nitrogen guns =

Nitrogen guns are valuable for drying small substrate pieces or samples that otherwise cannot go into the outer drying tools. 

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