Differences

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--- process_info_pdms_devices [2021/07/15 21:32] – [Silane Deposition] magnuson
+++ process_info_pdms_devices [2021/07/15 21:39] (current) – [Device Bonding] magnuson
@@ Line 395: / Line 395: @@
 ----
 ==== Solvent Cleaning ====
-Safety Considerations:
+**Safety Considerations:**
-Isopropyl Alcohol and Acetone are both flammable materials and cannot be placed directly in the sonicator bath. They must be contained within a separate vessel placed inside the bath.
+  * Isopropyl Alcohol and Acetone are both flammable materials and cannot be placed directly in the sonicator bath. They must be contained within a separate vessel placed inside the bath.
-Large chemical spills are a possibility. Pour all chemicals inside the fume hood.
+  * Large chemical spills are a possibility. Pour all chemicals inside the fume hood.
-Keep fume hood sash at or below maximum opening level to ensure adequate air flow.
+  * Keep fume hood sash at or below maximum opening level to ensure adequate air flow.
-PPE Required:
-Gloves (Latex or Nitrile)
-Eye Protection
-Lab Coat
-Materials Needed:
-Polypropylene (PP) bags
-Acetone
-Isopropyl Alcohol (IPA)
-Tools Needed:
-Sonicator Bath (Filled with DI Water)
-Beakers (if not using PP bags)
-Tweezers
-Plastic boards with beaker shaped cutouts (if using beakers)
-Rail with PP bag clips
-Procedure:
-Beakers
-Remove the metal lid of the sonicator bath. Check that the bath is filled to the operating level (if not, fill to the line with DI).
-Place the plastic cutouts across the bath, resting it on the ledges that seat the lid. One cutout has 2 openings, the other has only 1.
-Retrieve the appropriate beakers from the drying rack above the sink in the microfluidics lab. Select the beakers labeled Acetone, IPA, and DI Water. Confirm that each beaker has a plastic tube / zip tie ring around it to act as a cushion.
-Fill each beaker with the corresponding chemical using the solvent bottles in the cabinet underneath the fume hood.
-Carefully seat each beaker in one of the cutouts. Confirm that the base of the container rests below the water level.
-Using tweezers, Place the parts in the IPA beaker first. Sonicate for 5 minutes.
-Transfer the parts to the Acetone beaker. Sonicate for 5 additional minutes.
-Transfer the parts to the DI Water beaker. Sonicate for 5 additional minutes.
-Remove parts and dry with compressed air. Place into clean travel case and close lid to reduce contamination.
-Discard solvent in the solvent waste bottle found in the cabinet underneath the fume hood. Pour chemicals inside the fume hood and use the funnel (found next to the waste bottle) to minimize spills.
-Rinse beakers with DI water hang on the drying rack.
-Return the plastic cutouts to their storage place.
-If needed, replenish the DI water in the sonicator bath to the fill line.
-Replace the bath lid.
-Polypropylene (PP) Bags
+**PPE Required:**
-Remove the metal lid of the sonicator bath. Check that the bath is filled to the operating level (if not, fill to the line with DI).
+  * Gloves (Latex or Nitrile)
-Retrieve 3 PP bags from the blue container adjacent to the sonicator. Using a sharpie, label the bags Acetone, IPA, and DI Water.
+  * Eye Protection
-Using compressed air, gently pressurize the bags before releasing the pressure. This will break the static adhesion of the inside layers. Failure to do so may cause the solvents to overflow during filling.
+  * Lab Coat
-Fill each bag halfway with the corresponding solvent. Carefully pour the solvents to avoid spills, use the provided rack to keep the bag upright.
-Using tweezers, place the parts inside the IPA bag. Seal the bag and clip the filled bag to the rail.
+**Materials Needed:**
-Hang the rail across the sonicator bath, resting it on the ledges that seat the lid.
+  * Polypropylene (PP) bags
-Sonicate the part in the IPA bag for 5 minutes.
+  * Acetone
-Unclip the IPA bag from the rail, transfer the part to the Acetone bag, and seal. Clip the filled bag to the rail.
+  * Isopropyl Alcohol (IPA)
-Sonicate the part in the Acetone bag for 5 minutes.
-Unclip the Acetone bag from the rail, transfer the part to the DI Water bag, and seal. Clip the filled bag to the rail.
+**Tools Needed:**
-Sonicate the part in the DI Water bag for 5 minutes.
+  * Sonicator Bath (Filled with DI Water)
-Unclip the DI Water bag from the rail. Remove the parts, blow dry with compressed air, and place in a clean transport case.
+  * Beakers (if not using PP bags)
-Dispose of remaining solvents into the solvent waste jug (found in the cabinet underneath the fume hood). Pour all chemicals inside the fume hood and use the provided funnel to minimize spills.
+  * Tweezers
-Discard empty bags in the trash. Return clip rail to its storage position.
+  * Plastic boards with beaker shaped cutouts (if using beakers)
-If needed, replenish the DI water in the sonicator bath to the fill line.
+  * Rail with PP bag clips
-Replace the bath lid.
+**Procedures:**
+===Beakers===
+  - Remove the metal lid of the sonicator bath. Check that the bath is filled to the operating level (if not, fill to the line with DI).
+  - Place the plastic cutouts across the bath, resting it on the ledges that seat the lid. One cutout has 2 openings, the other has only 1.
+  - Retrieve the appropriate beakers from the drying rack above the sink in the microfluidics lab.   - Select the beakers labeled Acetone, IPA, and DI Water. Confirm that each beaker has a plastic tube / zip tie ring around it to act as a cushion.
+  - Fill each beaker with the corresponding chemical using the solvent bottles in the cabinet underneath the fume hood.
+  - Carefully seat each beaker in one of the cutouts. Confirm that the base of the container rests below the water level.
+  - Using tweezers, Place the parts in the IPA beaker first. Sonicate for 5 minutes.
+  - Transfer the parts to the Acetone beaker. Sonicate for 5 additional minutes.
+  - Transfer the parts to the DI Water beaker. Sonicate for 5 additional minutes.
+  - Remove parts and dry with compressed air. Place into clean travel case and close lid to reduce contamination.
+  - Discard solvent in the solvent waste bottle found in the cabinet underneath the fume hood. Pour chemicals inside the fume hood and use the funnel (found next to the waste bottle) to minimize spills.
+  - Rinse beakers with DI water hang on the drying rack.
+  - Return the plastic cutouts to their storage place.
+  - If needed, replenish the DI water in the sonicator bath to the fill line.
+  - Replace the bath lid.
+===Polypropylene (PP) Bags===
+  - Remove the metal lid of the sonicator bath. Check that the bath is filled to the operating level (if not, fill to the line with DI).
+  - Retrieve 3 PP bags from the blue container adjacent to the sonicator. Using a sharpie, label the bags Acetone, IPA, and DI Water.
+  - Using compressed air, gently pressurize the bags before releasing the pressure. This will break the static adhesion of the inside layers. Failure to do so may cause the solvents to overflow during filling.
+  - Fill each bag halfway with the corresponding solvent. Carefully pour the solvents to avoid spills, use the provided rack to keep the bag upright.
+  - Using tweezers, place the parts inside the IPA bag. Seal the bag and clip the filled bag to the rail.
+  - Hang the rail across the sonicator bath, resting it on the ledges that seat the lid.
+  - Sonicate the part in the IPA bag for 5 minutes.
+  - Unclip the IPA bag from the rail, transfer the part to the Acetone bag, and seal. Clip the filled bag to the rail.
+  - Sonicate the part in the Acetone bag for 5 minutes.
+  - Unclip the Acetone bag from the rail, transfer the part to the DI Water bag, and seal. Clip the filled bag to the rail.
+  - Sonicate the part in the DI Water bag for 5 minutes.
+  - Unclip the DI Water bag from the rail. Remove the parts, blow dry with compressed air, and place in a clean transport case.
+  - Dispose of remaining solvents into the solvent waste jug (found in the cabinet underneath the fume hood). Pour all chemicals inside the fume hood and use the provided funnel to minimize spills.
+  - Discard empty bags in the trash. Return clip rail to its storage position.
+  - If needed, replenish the DI water in the sonicator bath to the fill line.
+  - Replace the bath lid.
 ----
 ==== Device Bonding ====
-Safety Considerations:
+**Safety Considerations:**
-The oven poses a burn hazard. Use protective gloves when handling.
+  * The oven poses a burn hazard. Use protective gloves when handling.
-PPE Required:
-Insulated gloves.
+**PPE Required:**
-Gloves (Latex or Nitrile)
+  * Insulated gloves.
-Eye Protection
+  * Gloves (Latex or Nitrile)
-Lab Coat
+  * Eye Protection
-Materials Needed:
+  * Lab Coat
-Activated PDMS surface (for bonding)
-Activated glass surface (for bonding)
+**Materials Needed:**
-Aluminum foil
+  * Activated PDMS surface (for bonding)
-Tools Needed:
+  * Activated glass surface (for bonding)
-Oven
+  * Aluminum foil
-Tweezers
-Procedure:
+**Tools Needed:**
-The hydrophilicity of activated surfaces decreases rapidly with time. Perform this procedure immediately after surface activation. Use clean implements. Any dirt or contamination will negatively impact the device bonding.
+  * Oven
-Using clean tweezers, carefully pick up the two pieces to be activated. Bring the activated surfaces in contact with each other.
+  * Tweezers
-Work from one corner of the device to the other, gently pressing the surface to eliminate bubbles.
-Create a tray from aluminum foil, and place the device on it. This will facilitate baking the device.
+**Procedure:**
-Bake the joined device at 120 C for 20 minutes. This will create a permanent bond between the glass and the PDMS. (A drip tray is not necessary)
+  - The hydrophilicity of activated surfaces decreases rapidly with time. Perform this procedure immediately after surface activation. Use clean implements. Any dirt or contamination will negatively impact the device bonding.
-Remove the device and let cool.
+  - Using clean tweezers, carefully pick up the two pieces to be activated. Bring the activated surfaces in contact with each other.
+  - Work from one corner of the device to the other, gently pressing the surface to eliminate bubbles.
+  - Create a tray from aluminum foil, and place the device on it. This will facilitate baking the device.
+  - Bake the joined device at 120 C for 20 minutes. This will create a permanent bond between the glass and the PDMS. (A drip tray is not necessary)
+  - Remove the device and let cool.
 ==== Port Alignment Fixture ====