| Photolithography is the process of transferring geometric shapes on a mask to the surface of a silicon wafer. The steps involved in the photolithographic process are wafer cleaning; barrier layer formation; photoresist application; soft baking; mask alignment; exposure and development; and hard-baking. This is one of the most critical operations in the semiconductor manufacturing process. |
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| Berkshire recommends the following wipers for Photolithography |
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| MicroSeal SuperSorb ™ |
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2-ply bonded, 100% knitted polyester with ultrasonic heat seal
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Berkshire's most absorbent wiper
High abrasion resistance, works well with IPA, acetone and other solvents |
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| MicroSeal®-VP |
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100% continuous filament knit polyester with ultrasonic sealed edges
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Smooth surface with excellent loft and hand characteristics
High abrasion resistance, works well with IPA, acetone and other solvents |
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| ValuSeal-HA™ |
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100% knitted polyester with ultrasonic heat seal
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Critically low particles and fibers
Works well with IPA, acetone and other solvents |
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| MicroFirst LP® |
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58% polyester/42% lyocell nonwoven
Extremely pure, cleanest nonwoven in product line
Durable with high wet strength
Works well with IPA and other solvents |
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| MicroSeal® 1200 |
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100% knitted polyester, sealed edge
Works well with IPA, acetone and other solvents
Critically low particles and fibers
Lowest extractables and ions |
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| MicroSeal® 3000 - 9 x 9 |
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Tubular sealed edge two ply 100% polyester
Highly absorbent, pliable sealed edge
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Works well with IPA, acetone and other solvents |
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| Ultra-Seal 3000® 9" x 9" |
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Tubular sealed edge two ply 100% polyester
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Critically low particles and fibers due to only 2 edges
Tear resistant for rough surface cleaning |
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| Ultra-Seal 3000® 12 " x 12 " |
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Tubular sealed edge two ply 100% polyester
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Critically low particles and fibers due to only 2 edges
Tear resistant for rough surface cleaning |
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| ValuSeal-LP™ |
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100% knitted polyester
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Lowest Non Volatile Residues available
Steam autoclavable for aseptic environments |
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| ValuSeal™ 1500 |
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100% knitted polyester with sealed edge
Laundered and packaged in an ISO 4 (Class 10) cleanroom
Extremely low particles, fibers, ions and extractables
Holds and distributes greater liquid volume |
