Electronics Forum | Thu Apr 11 05:47:21 EDT 2002 | ianchan
Hi everyone, Does anyone have experience and applications knowledge, to help recommend a singulation machine? for depanelization process of a : 1) 0.65mm thickness PCBA, with 0603/0402 SMD, 2) with materials composition makeup of a 1.5oz copper,
Electronics Forum | Fri Apr 12 16:30:21 EDT 2002 | stepheno
If you are going to wavesolder the board after SMT you will have to epoxy the parts on instead of paste/reflow. I used to work for a company that squeeged it on. You will have to research component layout guidelines if you do want to wavesolder. If
Electronics Forum | Mon Apr 15 22:37:27 EDT 2002 | davef
Regarding your customer suditor, it would have been nice if you said something like ... Routinely, our testing shall be less than 1.56 microgram/cm^2 NaCl equivalent ionic or ionizable flux residue, according to TM-650, Method 2.3.35 'Detection And
Electronics Forum | Thu Apr 18 17:00:05 EDT 2002 | JamesL
We do cleanliness testing each morning using a Zero Ion tester. Our pass/fail number is set at 37ug/square inch NaCl. We are rarely above 10ug/square inch NaCl. We use Aqueous flux. Our inline washer has a prewash (70psi@130 degrees F), wash (?psi),
Electronics Forum | Thu Apr 18 17:29:00 EDT 2002 | dason_c
The industrial standard is follow the R.O.S.E test as a guideline per J-STD-001 and the limit is 10ug/sq. inch. Different tester with different equivalent factor with the ROSE and you can refer back to the manual, the Zero Ion tester with equivalent
Electronics Forum | Fri Apr 19 08:01:40 EDT 2002 | jnunns
We have been doing BGAs for about 3 years in house. We started off with an outside contractor and then brought it in. We are doing a variety of sizes from .05 to .03 pitch. We have 2D capability at print, but do not use it on any but the .03 pitch. T
Electronics Forum | Fri Apr 19 09:41:45 EDT 2002 | angiewest
We have been building BGA's for a couple of years. We even use a Universal Omni 4766 to place them with. Reflowing is where I thought we may have problems, Since we have an IR oven. But we bought a .010" thermocouple from Omega to measure the BGA
Electronics Forum | Fri Apr 12 17:10:41 EDT 2002 | davef
Consider: * Finding JEDEC [ http://www.eia.org/jedec/ ] publication that includes matrix trays is: �JEDEC Publication No.95 Registered and Standard Outlines for Solid State and Related Products�. * Contacting tray manufacturers [ie, Peak, Summit, Nep
Electronics Forum | Fri Apr 12 15:43:25 EDT 2002 | Fuji Spares
Screening adhesive can be messy but is alot quicker than using a glue machine as long as you setupyour stencil machine either manual or machine, we also use steel stencils with a stainless squeegee but you can use a rubber squeegee not sure about pre
Electronics Forum | Thu Apr 18 23:15:26 EDT 2002 | fastek
If Universal for example decides they want to implement a registration fee to pursade customers from buying used then why have they dropped their shorts from $20,000 to register a GSM in 2000 to $2,000 recently? Guess they were tired of losing custom
