Electronics Forum: glue aperture size (Page 1 of 54)

glue size

Electronics Forum | Wed Dec 27 23:04:10 EST 2006 | i want to learn from u

Most of pcb have white/black printing at bottom side of them to indicate the chip location. Normally, this printing are the same location to the place that glue will be mount. My problem are the glue size between the point that have printing and not

glue size

Electronics Forum | Thu Dec 28 22:39:49 EST 2006 | i want to learn from u

i just thought that it because of difference thickness between the silkscreen and without silkscreen. if we apply the same pressure and dispense time to this two difference location, the glue size will be difference. location with silkscreen will rea

glue size

Electronics Forum | Thu Dec 28 11:05:48 EST 2006 | realchunks

I know our glue looks different when applied over different color solk screen. Maybe it's just an optical illusion?

glue size

Electronics Forum | Thu Dec 28 12:19:20 EST 2006 | slthomas

So I'm the only one that's had crappy piles of silkscreen between pads?

glue size

Electronics Forum | Thu Dec 28 09:49:18 EST 2006 | slthomas

Tough call without seeing the board, but here's my best guess. You don't say if the glue dot is greater in height or diameter in the locations where you have printing (silkscreen), but I would guess that you might get either, or both, depending on ne

glue size

Electronics Forum | Fri Dec 29 12:46:24 EST 2006 | realchunks

Crappy piles? Weren't they a hard rock band in the 80's? I know on most of our boards the little silk screen dot is just the component identifier in really small font when looked at in Gerber. But this dot isn't very big, so I see how it can affec

glue size

Electronics Forum | Tue Jan 02 09:47:41 EST 2007 | slthomas

We had a supplier that put a [fuzzy and of variable height) line of ss between all chip R and C pads. Of course we were in low cost mode and had purchased a year's worth of boards.

glue size

Electronics Forum | Tue Jan 02 11:12:35 EST 2007 | realchunks

But that's how Purchasing is supposed to work, right? Then boast how they saved 50 bucks that day on buying slightly plemmed boards. Then you spend thousands of dollars over the course of the year reworking thru the plems. All the while management

glue size

Electronics Forum | Tue Jan 02 12:05:52 EST 2007 | slthomas

Not to mention the couple hunnert they save by NOT getting an air ride truck to ship a new inline printer. You'd be amazed at what an E5 can do to a pallet in 3000 miles. I can't believe the thing worked.

glue size

Electronics Forum | Tue Jan 02 09:54:56 EST 2007 | slthomas

Chalk this one up to semantics. Regardless of when you start pumping (do you use a needle with a foot? In that case the pump will run when the foot touches the board), your volume of epoxy is the same. You just have less room for it where there is si

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