{"id":3828,"date":"2025-03-05T16:30:00","date_gmt":"2025-03-05T08:30:00","guid":{"rendered":"https:\/\/www.dxfluidics.com\/?p=3828"},"modified":"2025-03-17T10:29:34","modified_gmt":"2025-03-17T02:29:34","slug":"pdms%e8%8a%af%e7%89%87%e6%88%90%e5%9e%8b%e5%b7%a5%e8%89%ba","status":"publish","type":"post","link":"https:\/\/www.dxfluidics.com\/en\/technical-support\/process-introduction\/3828\/pdms%e8%8a%af%e7%89%87%e6%88%90%e5%9e%8b%e5%b7%a5%e8%89%ba\/","title":{"rendered":"PDMS chip molding process"},"content":{"rendered":"

1. Introduction to PDMS<\/h2>\n\n\n\n

Polydimethylsiloxane (PDMS) is a high molecular weight polymer with the chemical formula (C\u2082H\u2086OSi)_n.<\/p>\n\n\n\n

PDMS material has excellent electrical resistivity, good biocompatibility, low cost, and ease of processing. When combined with a chip lab, it can be used to fabricate PDMS microfluidic chips<\/a>.<\/p>\n\n\n\n

This chip is widely used in fields such as biological diagnosis, drug analysis, food safety, and environmental monitoring.<\/p>\n\n\n\n

2. Introduction to PDMS molding molds<\/h2>\n\n\n\n
Comparison of different mold parameters<\/td><\/tr>
 <\/td>SU-8 Mold<\/td>PMMA Molds<\/td>3D printed molds<\/td>Silicon Mold<\/td><\/tr>
Material<\/td>SU-8 photoresist<\/td>PMMA<\/td>Photosensitive resin\/PLA<\/td>monocrystalline silicon<\/td><\/tr>
craft<\/td>lithography<\/td>Laser cutting\/CNC<\/td>3D printing<\/td>deep silicon etching<\/td><\/tr>
accuracy<\/td>~10\u03bcm<\/td>~100\u03bcm<\/td>20-50\u03bcm<\/td>Up to submicron level<\/td><\/tr>
costs<\/td>Height<\/td>low<\/td>medium<\/td>extremely high<\/td><\/tr>
durability<\/td>More than 50 times<\/td>~50<\/td>~20<\/td>>100<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

1) SU-8 mold processing technology<\/h3>\n\n\n\n

The mask required for chip design is selected based on precision, choosing either film mask or chrome plate mask; after coating, pre-baking, exposure, post-baking, and developing, an SU-8 mold<\/a> is produced.<\/p>\n\n\n

\n
\"\"
SU-8 mold processing technology<\/figcaption><\/figure>\n<\/div>\n\n
\n
\"\"
SU-8 Mold<\/figcaption><\/figure>\n<\/div>\n\n\n

2) Acrylic mold processing technology<\/h3>\n\n\n\n

The primary processes for manufacturing PMMA molds<\/a> are CO2 laser ablation and CNC machining.<\/p>\n\n\n

\n
\"\"
Schematic diagram of CO2 laser ablation<\/figcaption><\/figure>\n<\/div>\n\n
\n
\"\"
PMMA Molds<\/figcaption><\/figure>\n<\/div>\n\n\n

3) 3D printing mold processing technology<\/h3>\n\n\n\n

Common 3D printing technologies are mainly divided into fused deposition modeling (FDM), stereolithography (SLA), selective laser sintering (SLS), and layered solid manufacturing (LMO).<\/p>\n\n\n

\n
\"\"
SLA 3D printing molding principle diagram<\/figcaption><\/figure>\n<\/div>\n\n
\n
\"\"
Epoxy Resin molds<\/a><\/figcaption><\/figure>\n<\/div>\n\n\n

4) Pure silicon mold processing technology<\/h3>\n\n\n\n

Pure silicon molds<\/a> are made using deep dry ion etching (DRIE) technology, Bosch process, and KOH solution.<\/p>\n\n\n

\n
\"\"
Pure Silicon Mold Processing Flow Chart<\/figcaption><\/figure>\n<\/div>\n\n
\n
\"\"
Silicon Mold<\/figcaption><\/figure>\n<\/div>\n\n\n

3. PDMS chip molding process<\/h2>\n\n\n\n

Mix the adhesive, evacuate the vacuum, pour the PDMS adhesive (optional models: Dow Corning 184 or Momentive 615); after curing, demolding, cutting, and drilling holes, clean with a plasma cleaner before bonding.<\/p>\n\n\n

\n
\"\"
PDMS chip process<\/figcaption><\/figure>\n<\/div>\n\n
\n
\"\"
PDMS chip<\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"

1.    PDMS\u4ecb\u7ecd \u805a\u4e8c\u7532\u57fa\u7845\u6c27\u70f7\uff08Polydimethylsiloxan […]<\/p>\n","protected":false},"author":2,"featured_media":3838,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89],"tags":[],"class_list":["post-3828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-process-introduction"],"yoast_head":"\nPDMS\u82af\u7247\u6210\u578b\u5de5\u827a - \u9876\u65ed\u5fae\u63a7<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dxfluidics.com\/en\/technical-support\/process-introduction\/3828\/pdms\u82af\u7247\u6210\u578b\u5de5\u827a\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PDMS\u82af\u7247\u6210\u578b\u5de5\u827a - 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