Electronics Forum | Thu Jan 27 17:54:37 EST 2000 | Steve Harshbarger
Casimir, I have seen exactly what you are experiencing with the Kester 958 on other wave lines. No clean fluxes vary in how much flux residue is visually left behind. These no clean residues are typically not harmful to the PCB, but they are often
Electronics Forum | Fri Jan 28 06:01:13 EST 2000 | k.s park
HI. Mr. Dave F First of all I appreciate your advise. Here is the answer to the question you sent. I was considering the solder inspection m/c for a long time. so i bought the LSM2 last year.i thinks it was good for me. further more Last year
Electronics Forum | Fri Jan 21 09:34:56 EST 2000 | Eric Krone
Throughput is usually measured by how many components are placed over the production day. Making sure it is actually placing parts all available hours of that production day optimizes the placement machines performance. The time the machine is actu
Electronics Forum | Wed Jan 19 23:24:03 EST 2000 | armin
Hi, We have a couple of pcb's with PTH Crystal. We are looking for a spacer to be placed between the metallic body of the crystal and the via pad/land as they tend to short if wave soldered without a spacer. The spacer we are looking for is somethin
Electronics Forum | Mon Jan 17 21:01:21 EST 2000 | Dave F
Dennis: On your BGAs: * Never seen voids any place other than the top ... lower density stuff rises. * Our spec on voids says: 1 Voids 1a Voids in soldered balls shall be less than 20% of the diameter of the solder ball. 1b No void shall sho
Electronics Forum | Mon Jan 17 02:40:17 EST 2000 | park kyung sam
Hi. smtman would someone answer me ? it's just the stuff pop ups without deep thinking. how much do our department spend money for 1 chip soldering. what should i consider ? i wonder i spend more money than other guys out there for 1 chip soldering i
Electronics Forum | Tue Jan 11 05:46:09 EST 2000 | Wolfgang Busko
Hi Dave, that was kind of a more rhetorical question. Normally paste is used before shelflife expires and delivery time is short enough to get in no trouble. The normal situation is that you try to get your equipment running means constant use of pas
Electronics Forum | Wed Jan 05 11:01:37 EST 2000 | Ron Lahat
I have in design a 400mm x 400mm pcb 3.0 mm thick heavily populated with BGAs 50 mil pitch and want to run a double sided reflow process with overlapping BGAs (CS/PS) 1. can I avoid a selective jig for PS BGAs?(weight calculation ?) 2. Is it possibl
Electronics Forum | Tue Jan 04 15:38:19 EST 2000 | Pat Pepper
Hi everyone: Our company is trying out immersion white tin for fine pitch assembly with what I would call mixed results. Reflow solder looks very good, but wave solder looks somewhat grainy (this may not be a problem in actuality). We had dewettin
Electronics Forum | Fri Jan 14 08:05:23 EST 2000 | Pat Pepper
Hi Dave, Thank you for the response. In answer to your responses I'll use the original numbers of my questions. 1. We would like to turn around our boards fast, but sometimes due to the market conditions we wind up with inventory. After reading
