Electronics Forum: lpi (Page 1 of 10)

What happens to LPI Solder Mask on the RF4 PCB During Reflow?

Electronics Forum | Tue Apr 08 22:41:22 EDT 2008 | davef

Duno. Which LPI Solder Mask are you using?

What happens to LPI Solder Mask on the RF4 PCB During Reflow?

Electronics Forum | Tue Apr 08 15:27:33 EDT 2008 | arminski

hi experts, need more info on what's happening with the LPI Solder Mask on an FR4 PCB during reflow of both Leaded and Lead Free Process? Do they become soft as well while exposed to the extreme temperatures? regards,

What happens to LPI Solder Mask on the RF4 PCB During Reflow?

Electronics Forum | Mon Apr 21 14:04:24 EDT 2008 | arminski

Hi dave, sorry for my late reply...right now do not have info about the LPI and I'm not allowed to talk to our supplier without going through our sales people...sux! cheers!

What happens to LPI Solder Mask on the RF4 PCB During Reflow?

Electronics Forum | Fri Apr 25 14:32:08 EDT 2008 | blnorman

Find out what the Tg of the LPI is. Below - rigid, above - flexible.

via capping

Electronics Forum | Thu Jan 07 09:44:57 EST 2010 | cbart

What material is used to cap a via? Is it the standard LPI Process/Material?

Applying Thicker LPI Soldermask

Electronics Forum | Mon Jul 01 16:15:02 EDT 2002 | Matt Kehoe

We are currently trying to gather information pertaining to applying LPI soldermask thicker than normal. The thick coating is necessary for the SIPAD ssd process however, because of the numerous brands of mask and application methods there is no sing

how to protect pads while applying solvent green mask? cure?

Electronics Forum | Wed Jun 18 20:27:28 EDT 2008 | davef

No, we not sure if your solder mask is LPI. The article we linked was aimed at solder mask application methods. LPI is the most common mask in use today. So, what kind is it? Green tells you nothing. Solder mask can be a variety of colors.

No-clean, water-based flux residues after wave...

Electronics Forum | Wed Feb 04 16:33:40 EST 2009 | davef

Your specification for all PCB suppliers of 'solder mask over bare copper using LPI on external layers (green)' is broad and open to the use of material from many possible LPI suppliers by your board fabricator. In at least one case, it appears that

Applying Thicker LPI Soldermask

Electronics Forum | Mon Jul 01 20:45:38 EDT 2002 | davef

Solder mask thickness specifications by fabricators are: * Wet mask: 0.0002 ~ 0.0004� on trace * LPI mask: 0.0002 ~ 0.0008� on trace Liquids usually range between 10 to 13 um (0.00039 to 0.00051") when dried. Liquid resist processes I have seen are

Using LPI w/ tented vias

Electronics Forum | Fri Jun 09 17:34:08 EDT 2000 | Melanie Mulcahy

I need some information regarding the acceptability/unacceptability of using tented vias with LPI soldermask. Long story on all involved, but basically I have a board that I have had manufactured with no problems which has BGA/uBGA parts, tented via

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