词条 | Solder mask |
释义 |
Solder mask comes in different media depending upon the demands of the application. The lowest-cost solder mask is epoxy liquid that is silkscreened through the pattern onto the PCB. Other types are the liquid photoimageable solder mask (LPSM or LPI) inks and dry-film photoimageable solder mask (DFSM). LPSM can be silkscreened or sprayed on the PCB, exposed to the pattern and developed to provide openings in the pattern for parts to be soldered to the copper pads. DFSM is vacuum-laminated on the PCB then exposed and developed. All three processes typically go through a thermal cure of some type after the pattern is defined although LPI solder masks are also available in ultra violet (UV) cure. In electronic design automation, the solder mask is treated as a layer of the printed circuit board, and is described as a Gerber file like any other layer, such as the copper and silkscreen layers.[3] Typical names for these layers include tStop/bStop (EAGLE), LSMVS/LSMRS (WEdirekt) or GTS/GBS (Gerber and many others). References1. ^1 {{cite web |title=Soldermask: it's not just green anymore whether it's to identify revision changes or to look trendy in a see-through box, soldermask is taking on a rainbow of colors. But your processes will have to change with the hues. |author-first=Jody |author-last=Williams |date=2005-03-01 |publisher=UP Media Group, Inc. |url=http://www.thefreelibrary.com/Soldermask%3A+it's+not+just+green+anymore+whether+it's+to+identify...-a0130564604 |access-date=2015-11-14 |dead-url=no |archive-url= |archive-date=}} [1][2]2. ^1 {{cite web |title=FreePCB User Guide |version=1.4 |author-first=Allan |author-last=Wright |date=2007-04-14 |url=https://www.wellpcb.com/sites/default/files/freepcbuserguide.pdf |access-date=2018-06-17 |dead-url=no |archive-url=https://web.archive.org/web/20180617180659/https://www.wellpcb.com/sites/default/files/freepcbuserguide.pdf |archive-date=2018-06-17}} }} Further reading
1 : Printed circuit board manufacturing |
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