Electronics Forum | Tue Apr 27 12:14:08 EDT 1999 | M Cox
Board Experts I am fighting with a board house about a delamination problem.. First the facts 1) 10 layer board .063 thick HASL Finish Aprox 16 in x 17 in. 2) 150 Boards with this part number built with the same reflow oven settings (212 c max t
Electronics Forum | Fri Dec 13 09:06:30 EST 2002 | russ
One thing I have found when using square or diamond etc... Fiducials is, if it is a HASL finish board, the finish may be thick and the fid camera will see them having rounded edges different sizes etc.. and will cause quality failures. Russ (My sp
Electronics Forum | Tue Oct 17 12:15:19 EDT 2000 | NLykus
Dave, Current process is Insert through hole components topside Dispense SMT glue Place SMT components bottom side Glue cure Insert 1 through hole component by hand Wave Wave temperature is 480oF Topside preheats in D.O.E ranged from 99oc to 108oC
Electronics Forum | Tue Apr 27 13:58:15 EDT 1999 | Scott McKee
| Board Experts | | I am fighting with a board house about a delamination problem.. First the facts | 1) 10 layer board .063 thick HASL Finish Aprox 16 in x 17 in. | 2) 150 Boards with this part number built with the same reflow oven settings (2
Electronics Forum | Tue Apr 27 17:22:40 EDT 1999 | Dave F
| Board Experts | | I am fighting with a board house about a delamination problem.. First the facts | 1) 10 layer board .063 thick HASL Finish Aprox 16 in x 17 in. | 2) 150 Boards with this part number built with the same reflow oven settings (2
Electronics Forum | Tue Oct 03 17:11:42 EDT 2006 | cuculi54986@yahoo.com
Our board suppliers tell us, there is no specification they use for HASL thickness, other than "coverage". They also say they have very little control over the HASL thickness. This was not an issue for us in the past, until we started using Pb-fr
Electronics Forum | Thu Jan 06 06:15:49 EST 2005 | mattkehoe
We need some opinions about a situation that is causing problems in our process. The pcb's in question are .125 thick with a HASL finish. The boards are coming in with a large amount of solder trapped inside the via holes. Sometimes this solder is ac
Electronics Forum | Mon Jun 14 14:39:12 EDT 2004 | davef
HASL Thickness: * HADCO DFM manual specifies a nominal thickness of 50-1500uin with an option for 100-1000uin * Merix DFM manual specifies 30-200uin IPC-6012, Class 1, 2, 3 do not spec a HASL thickness at all but only require that full coverage is m
Electronics Forum | Wed Jan 05 11:11:09 EST 2000 | Dave F
Hey Pat: My responses are: 1. Does anyone have experience with the shelf life on immersion white tin? If so, how long can the boards be stored without adversely affecting solderability. I've heard one year. No, we don�t, because we turn boards fa
Electronics Forum | Tue Jul 27 07:06:59 EDT 2004 | davef
HASL Thickness: * HADCO DFM manual specifies a nominal thickness of 50-1500uin with an option for 100-1000uin * Merix DFM manual specifies 30-200uin * Our boards (from a major fab) average 500uin with an "as measured" range of 300-800uin Be careful
