Electronics Forum: 0603 aperture pitch (Page 1 of 55)

TSOP40 Lead pitch 0.50mm recommended aperture sizes?

Electronics Forum | Thu Mar 06 10:57:28 EST 2003 | Mark

What are the recommended stencil apertures for a TSOP40. Lead pitch 0.48mm & lead width 0.21mm. And direction of squeegee print over the aperture? Recommended Stencil thickness? Recommended aperture reductions? Recommended pcb pad sizes? Recommended

TSOP40 Lead pitch 0.50mm recommended aperture sizes?

Electronics Forum | Tue Mar 11 09:33:06 EST 2003 | davef

I'm wrong about the MPM AP. I got my model designation crossed-up and was thinking of an older unit. I apologize to MPM for for my unfair criticism of their product.

TSOP40 Lead pitch 0.50mm recommended aperture sizes?

Electronics Forum | Fri Mar 07 14:09:16 EST 2003 | davef

Q1: What are the recommended stencil apertures for a TSOP40. Lead pitch 0.48mm & lead width 0.21mm. A1: We've talked about this previously here on SMTnet, for instance check the fine SMTnet Archives: http://www.smtnet.com//forums/index.cfm?fuseactio

TSOP40 Lead pitch 0.50mm recommended aperture sizes?

Electronics Forum | Fri Mar 07 21:02:21 EST 2003 | neil

When printing below .5mm pitch, the recommended stencil thickness is 5Thou, laser cut. Do not use any reduction and ensure wherever possible the pad to space ration is 1:1, the length of the pad is not as important as the gap between adjacent pads. T

TSOP40 Lead pitch 0.50mm recommended aperture sizes?

Electronics Forum | Sat Mar 08 11:04:47 EST 2003 | Joe

Mark, You've already received some good advice from the other posters. The one thing I would add is that even if you solve your printing issues on this type of part, the relative small quantity of paste may be prone to soldering problems. Ever s

Stencil aperture positional accuracy

Electronics Forum | Thu Jun 14 13:12:53 EDT 2012 | scottp

I haven't been in a bad enough situation to try it yet, but I had a conversation with Alpha Metals when we started doing 0.4 mm pitch and they mentioned that if we got into a situation like yours we could send them a board and they'd modify the artwo

Stencil aperture positional accuracy

Electronics Forum | Thu Jun 14 21:48:41 EDT 2012 | kmots15

We work with a lot of larger boards over 24", haven't run into this issue yet. I agree with scott could be your board supplier if they are lower quality, from something as simple as unit conversions in CAD to dealing with different temperatures. A

Stencil aperture positional accuracy

Electronics Forum | Fri Jun 15 18:22:49 EDT 2012 | stentech

Our lasers are accurate to +/- approx. 5 microns over 20 "X-Y. I have seen boards 18 x 24 stretch 7mils. I would agree with others, the only way is to send a board to you stencil vendor so they can edit the file to match the board. This is very commo

Re: 0603 component drift

Electronics Forum | Tue Jun 20 02:51:52 EDT 2000 | Leland Woodall

Gary, We've experienced the same problem in the past, and found that moving the stencil apertures closer together solved the dilemma. This was a much easier solution than having to redesign the PWB. Leland

0603 LED Tilt

Electronics Forum | Mon May 27 16:17:30 EDT 2013 | nikyta

Hi Eric, you have the right reduction on the stencils apertures? Also, a very oxidized solder paste can -and will do- promote and increase both the tombstoning as well as the solder balls.

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