Electronics Forum | Fri Oct 05 15:35:19 EDT 2018 | davef
Paste sticking to squeegee: * Squeegee is heavily magnetized * Some pastes stick more than ... * Plastic squeegees stick more than metal * Old metal squeegees stick more than new * Paste needs to be worked * Paste needs to be at room temperatur
Electronics Forum | Mon Dec 03 15:03:49 EST 2018 | dleeper
I can't open your spread sheet to see how you calculate this, but usually this sort of calculation assumes the leads are spaced symmetrically on both sides of the part and the center of mass is between them. Gravity pulls the part down, while the wet
Electronics Forum | Fri Dec 08 10:21:59 EST 2000 | Jim M
I just received the IPC Fall/Winter catalog from IPC for year 2000.IPC-7095 is listed as released in August 2000. There is a member price as well as non-member price.These spec's are available at www.ipc.org or call them at 847-790-5362. Have fun J
Electronics Forum | Fri Jul 07 11:06:44 EDT 2000 | John O'Brien
You ought to consider Data Matrix directly marked on the boards It can be done with laser, inkjet, or other permanent marking methods. Never falls off, can be read even if 30% is obliterated. For an example, check any AMD (K6, K7) or Intel Pentium c
Electronics Forum | Mon Oct 25 16:04:02 EDT 1999 | Dave F
Jerry: You don't have to yell, we can see you fine Are your first side component going to fall off of the board or have their reliability affected during second side processing? If not, go for it!! Lots of people reflow through hole components.
Electronics Forum | Thu Jun 17 17:04:43 EDT 1999 | Doug Batten
Does anyone have experience with placing heat sinks on BGAs? I have limited experience with PSA (pressure sensitive adhesives)heat sinks, and am interested with the possibility of a clip-on device. I am specifically concerned with ease of assembly
Electronics Forum | Wed Jun 16 15:31:47 EDT 1999 | JERRY JOHNSON
WOULD LIKE TO DO RELOW OF 2 SIDED SMT BOARDS. USUALLY THE BOTTOM SIDE HAS RESISTORS AND CAPS ONLY. WHEN THE BOTTOM OF THE BOARD HEATS UP, THE PARTS ARE FREE TO MOVE AND ONLY SURFACE TENSION WILL KEEP THE COMPONENT FROM FALLING OFF. CAN BOARDS BE RUN
Electronics Forum | Wed Apr 21 10:18:37 EDT 1999 | Dave F
| | We purchased a VT-8000 system from Orbotech about 9 months ago and have been quite impressed. Wade: Who were the top three AOI systems that you considered? What were the things that distinguished the VT-8000 from the other systems? Where did
Electronics Forum | Thu Feb 11 14:36:42 EST 1999 | Evelyn York
Hey, has anybody experienced problems with solder balls falling off BGA's? I have not been able to identify a contaminant nor any physical problems that would cause this. On packages with 'good' adhesion I have not observed any intermetallic form
Electronics Forum | Fri Jan 08 16:31:05 EST 1999 | Jason Tomlinson
Our company is beginning to delve into some 20 mil applications and I'm curious to hear what kind of success others have had placing these components. What kind of fall out rates we might expect or any specific difficulties encountered and what acti
