Full Site - : length of terminal (Page 29 of 36)

Epoxy on bottom of SMT component

Electronics Forum | Tue Dec 04 10:30:16 EST 2007 | slthomas

Q: The question I have is do they wet in wave solder, and if they do, why does it matter what happens to them in reflow? A: Yes, but somebody here don't agree with me that the glued part need help from wave to get the good wetting. They are wrong

Re: Proflow of DEK screen printer

Electronics Forum | Tue Sep 07 15:28:13 EDT 1999 | Earl Moon

Listed below are the issues Viking has been experiencing since the installation of the Proflow Head: 1. After installing new 350mm Wiper foil with metal strip glued on it, It worked for about a week and suddenly metal stri

Re: Proflow of DEK screen printer

Electronics Forum | Wed Sep 08 08:25:26 EDT 1999 | Brad Kendall

Listed below are the issues Viking has been experiencing since the | installation of the Proflow Head: | 1. After installing new 350mm Wiper foil with metal | strip glued on it, It worked for about a week and suddenly meta

Who of you experts can tell me the history of SMT?

Electronics Forum | Mon Dec 10 09:32:14 EST 2001 | cmay

William, Just to start with, I am no expert, but I have a few books lurking. According to one entry, Surface Mounted resistors stuck to circuit boards had been described in 1952 (Circuit World, Feb edition 1952, page 70) The first mention of a devi

Re: Resistor Paks on solder side of board

Electronics Forum | Thu Jul 20 15:37:53 EDT 2000 | Tekguy2000

These parts are flat chip resistor arrays that have 4 end terminations on each side. It looks liek an IC but is typically in an 0805 and 1206 package type with convex terminations. .031" pitch from termination to termination and .011" spacing between

Why 50 mils in 0805 package instead of 40 mils.

Electronics Forum | Fri Oct 03 05:50:53 EDT 2003 | kanwal324

All the packages like 0603,0402,0201 have half the width as compared to length but in case of 0805 package width is 50 mils instead of 40 mils. Is there any special reason designing point of view. Please tell if anybody knows.

What is the advantage of having zigzag tracks on PCBs?

Electronics Forum | Mon Apr 25 15:58:15 EDT 2011 | davef

There is no advantage for fabricators or assemblers. In high speed memory busses, designers zigzag the traces to keep all of the traces within a certain length of each other.

Re: Found solder bridging under SMT Chip of Wave process

Electronics Forum | Tue May 23 15:01:24 EDT 2000 | A. Marques

Hello, I think the problem can be: 1.�- some humidity in the adhesive, 2.�- some bubble of air in the adhesive when you cured the adhesive some humidity will go evaporate and when you make the soldering the same soldering will make a bridge between t


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