Electronics Forum: ssop pad width (Page 1 of 19)

Conductor width tolerances

Electronics Forum | Tue Nov 09 05:14:49 EST 1999 | Wolfgang Busko

Hi all, our problem we face is the mismatch of conductor width on the delivered PCB and the nominal width given by CAD-data. With CAD we are improving pads and conductors to match the specific needs for soldering and the board houses counteract our i

0306 pad design

Electronics Forum | Fri Dec 20 10:13:38 EST 2002 | davef

The total inductance of a chip capacitor is determined both by its length to width ratio and by the mutual inductance coupling between its electrodes. So, a 1210 chip size has a lower inductance than a 1206 chip. Check with your supplier for recomm

0402 pad designs???

Electronics Forum | Tue Jun 24 12:56:26 EDT 2014 | jmathis

Hello, As our company has begun doing an increase production of contract manufacturing I have seen more and more designs with the 0402 pad layouts that are smaller (.015 in width) than the component. Also there is only a .008 longer than the 0402 p

Enlarge Pads on Corner SSOP Package Pins.

Electronics Forum | Tue Aug 23 16:58:34 EDT 2011 | asksmt

Hi, Any one known if it is really benificial to enlarge the end pads width of SSOP package ? does this really solve any cold solder issue ? facing some cold solder issues on one design only ! Please suggest ! Thanks alot in advanced..!

IP1 and SSOP28

Electronics Forum | Tue May 18 16:40:22 EDT 2010 | m79d

I am having some problems getting the IP1 to place a SSOP28 package,pitch 0.65mm lead width 0.3mm. I am selecting computer vision 012 (tried 011) and vision type 100. EL data was put in looking at the datasheet and also measuring the device. Have tri

IP1 and SSOP28

Electronics Forum | Tue May 18 21:43:02 EDT 2010 | ashley

Hello mickd, 1) The EL data & Vision_type is NOT necessary when using MCS30 for IP1 machine. note : your input of the above might have cause confusion during VP, hence the OS error. 2) I would suggest the following... 2a) lower the Lead_check_are

Land size

Electronics Forum | Wed Jul 09 10:15:57 EDT 2008 | aj

I have carried out some further measurements on the device and the results are as follow: Component Lead width measures 183 microns. Actuals PAD width measures 158 microns. What I am thinking is that the lead is attracting the solder hence prevent

Enlarge Pads on Corner SSOP Package Pins.

Electronics Forum | Wed Sep 07 00:47:53 EDT 2011 | woodsmt

PCB, What is telling you that you have cold solder? You do not give much info. My QA/QC love this term to describe a multiple of issues. They are usally very wrong. If this is a reflow process and it just affects one part? An SSOP is not likley t

Enlarge Pads on Corner SSOP Package Pins.

Electronics Forum | Mon Aug 29 13:43:58 EDT 2011 | jax

Enlarging the "End Pads" is normally done to help accomodate the Wave soldering process... works as solder thief to help eliminate bridging on the last 2 pins to cross the wave. It is reasonable to assume that, if you are seeing cold solder due to fl

Solder bridges on TQFP 100 part

Electronics Forum | Wed Aug 07 12:41:58 EDT 2019 | slthomas

Are the apertures on the stencil reduced in width or 1:1 with the pads? It depends on the pad width and foil thickness but we usually reduce aperture width for any part that results in an aperture wall spacing of less than 8.5 mils.

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