Electronics Forum | Thu Oct 28 20:45:38 EDT 1999 | chris
Hi Dave, We suspect that the organic FM causes the non-wetting problem. FTIR analysis confirm that the FM is a flux residue. Dave we only used FTIR to detect organic contaminants, we also used SEM/EDX to determined the elemental composition of the
Electronics Forum | Fri Oct 29 09:36:42 EDT 1999 | Dave F
Chris: Thanks. SMTnet has a "Library." Buried deep within it is a listing of terms. The following is from that listing: Shadowing. When a component blocks the heat or solder wave flow from certain areas of the printed circuit board, resulting in
Electronics Forum | Tue Oct 26 14:11:25 EDT 1999 | Dave F
Gary: Two things: 1 Reworking golding fingers is an old topic, check the SMTnet archives to get started. 2 Gold fingers should not be discoloring, unless: * You are doing something bad to them ... OR * Your supplier has doinked the process, which
Electronics Forum | Tue Oct 26 11:22:45 EDT 1999 | Morris
I am evaluating a bottom side glueing process. I was wondering if anyone could share their shear force specifications, or how they were developed. I would be most interested in the 0805 and Sot23 package types. Also, does anyone know if heating th
Electronics Forum | Tue Oct 26 11:15:55 EDT 1999 | Morris
I am evaluating a bottom side glueing process. I was wondering if anyone could share their shear force specifications, or how they were developed. I would be most interested in the 0805 and Sot23 package types. Also, does anyone know if heating the
Electronics Forum | Thu Oct 28 20:14:28 EDT 1999 | xujun
hi,sai: we have a same m/c that is cp-43,but we haven't encounter the problem about servo board.I think is ac- speed- adjustment servo board.if you can conform th board is bad,consulting the fuji service agent is the best way! best regards
Electronics Forum | Mon Oct 25 19:29:12 EDT 1999 | g cronin
hi mario there is a company called motion automated that makes a nifty press, i have one in my shop that i have used for a while. well built and they have been able to make me custom tooling as well at reasonable prices. i'm going to try to dig u
Electronics Forum | Mon Oct 25 15:56:56 EDT 1999 | Dave F
William: Three things: 1 If the gold is porous, it will not protect the nickel and the nichel wiil oxidize and become unsolderable. 2 If the nickel is not solderable, the gold overcoat will not improve that. 3 Ag or Au over electroless Ni creates b
Electronics Forum | Mon Oct 25 16:35:04 EDT 1999 | William
I am pretty sure I am not having a problem w/porous gold or nickel that does not solder. How about electroless versus electrolytic? I thought electrolytic was for goldfingers and such applications. Can you use electrolytic plating for fine pitch a
Electronics Forum | Mon Oct 25 21:28:38 EDT 1999 | Dave F
3%) concentrations of gold form brittle intermetallic compounds with the tin in your solder. Electroless gold is applied with an autocatalytic process that self-limits around 5 mils thickness. You're correct electrolytic gold is used for goldfinger
