Electronics Forum | Thu Apr 22 15:27:44 EDT 1999 | Hugh M
| | I keep hearing about polyimide stencils, but what are they like in terms of registration and aperture accuracy? | | | You are hearing about polyimide as in polyimide film as Kapton (TM Dupont). This material is the stuff of flex and rigid/flex c
Electronics Forum | Wed Feb 20 13:23:33 EST 2002 | dgeorge
I have some interesting problems on my hands that some of you may know the answers to. I am currently wave soldering a through hole connector to a rigidized flexible circuit. This is a compliant pin connector that is supposed to be pressed into a h
Electronics Forum | Tue Dec 08 11:49:44 EST 1998 | Dave F
All Y'All: A recent (10/98) article in "Circuits Assembly" magazine touted the use batch cleaners using a aqueous alcohol solvent. Reported benefits of this approach were: 1 Better use of floor space 2 Ability to develop custom recipes 3 Ability
Electronics Forum | Sun Jun 07 09:01:47 EDT 2009 | davef
IPC T-50, Revision H, Terms and Definitions for Interconnecting and Packaging Electronic Circuits, 96.2176 Pad Cratering. A separation of the pad from the printed board resin/weave composite or within the composite immediately adjacent to the pad as
Electronics Forum | Fri Nov 13 23:33:33 EST 1998 | Kallol Chakraborty
| | | I believe that gold fingers on my circuit boards are being | | | contaminated and need to clean them with some chemical | | | solution. Any recommendations. | | | | | Chuck: What is the type and source of your contamination? Dave F | | We a
Electronics Forum | Sat Nov 14 08:05:54 EST 1998 | Earl Moon
| | | | I believe that gold fingers on my circuit boards are being | | | | contaminated and need to clean them with some chemical | | | | solution. Any recommendations. | | | | | | | Chuck: What is the type and source of your contamination? Dave
Electronics Forum | Wed Dec 09 19:21:13 EST 1998 | Bill Schreiber
Dave, Be careful if you plan to clean misprinted PCBs in a spray type batch cleaner. There is an article written by Dick Clouthier of AMTX Stencils regarding batch cleaners and their use for cleaning misprints. He describes it as a "solder ball nig
Electronics Forum | Thu Jul 30 14:16:32 EDT 1998 | Phil Crane
| WHAT SHOULD THE RATIO BE OF STENCIL APERATURE TO PAD TO GET GOOD QUALITY RESULTS. BY THAT I MEAN, A MINIMM OF SOLDER BALLS, AND LITTLE TO NO BRIDGING, SHORTS, ETC.. | RIGHT NOW WE ARE USING A 1:1 RATIO, BUT ARE INVESTIGATING REDUCING THE APERATU
Electronics Forum | Sun Aug 02 06:54:26 EDT 1998 | Bob Willis
You may liketo contact Chemtech in the UK. http://chemteck.co.uk as they have a new hand book on stencils and a design guide due for release shortly there is also some stencil information as a survey on types and price on my web sites under surveys h
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
Midwest Circuit Technology provides Carbide Router Bits and End Milling Cuters for use in PCB Depaneling equipment. We have over 35 years of supplying tools and machining experience in drilling, Routing, Test Fixture manufacture.
114 Barrington Town Square
Aurora, OH USA
Phone: 13309956900