Electronics Forum: pcb (Page 263 of 935)

Pressure check for SMT machine placement.

Electronics Forum | Mon Apr 12 04:56:54 EDT 2004 | qualitel

Hi Eric, Every mounter have a standard count and "release" off the component. The sample and cost saving way is to use the paper (e.g: 4mil,5mil...thick) to measure. Just place on the PCB with supoort base below and release the nozzle step by

PCB Supports

Electronics Forum | Thu Jun 10 16:21:43 EDT 2004 | Charlie

Guy,s I do not have Red-e-set, but Grid-lok offers a fully automatic system that easily installs onto the printers and P&P. It can be set to your board instantly by pressing one button or triggered by the printer to set for each consecutive PCB. They

PCB Manufacturer (SMT Technology) should read this

Electronics Forum | Wed Jun 16 21:56:04 EDT 2004 | rodionp

For those who are not sure as to what exactly we do, please get familiar with the article: http://www.reed-electronics.com/semiconductor/index.asp?layout=article&articleid=CA71291&industryid=3026 Which is PCB Assembly Optimization, what we do is we

Surface finishes / shelf-life

Electronics Forum | Wed Jul 07 11:49:34 EDT 2004 | Svensen

Curiously... Shelf-life of the plating alternatives has been mentioned several times as a potential issue in these discussions. Tell me is there a market for a simple plastic packaging which could extend shelf life (and hence solderability) of these

Stencil design for flex-rigid PWB

Electronics Forum | Thu Sep 16 07:07:34 EDT 2004 | C Lampron

Hello Chris, "It sticks up about 3/8" or so above the surface of the board." Is this over the ridgid portion of the PCB or in between? Is it possible to create a support fixture for printing that has relief that will allow the flex to bow downward i

BGA function test

Electronics Forum | Wed Dec 22 10:18:52 EST 2004 | tonyfox

Our company laser re-ball's BGA down to 100 microns ball size. One of our OEM customers have asked us to function test there BGA on Mobile phone PCB's. Origionally we thought of a test sockets however the sockets interfere with other devices on the P

SMT LED placement with Universal HSP 4791

Electronics Forum | Tue Jan 11 11:08:03 EST 2005 | clarkk

Hello, We are assembling a large pcb with 256 Lumex #SSL-LXA228SRC-TR31 SMT LED's on an HSP 4791. The part I'm using for the library is a modification of an existing SMT LED from the standard library. The problem is that the HSP rejects about 30% of

White tin pcb, smt production

Electronics Forum | Sat Mar 05 22:44:44 EST 2005 | gpaelmo

You can also try the Florida Circtech website or call them direct. There is a min. thickness requirement and if the board house does not follow it you will end up with scrap boards after the second pass (from experience). I even sent blank boards to

Screen printing Solder Mask

Electronics Forum | Fri Mar 04 11:00:37 EST 2005 | mrduckmann2000

Anybody have any ideas on the proper way to screen solder mask onto a PCB? I am going to cover SMT parts that were soldered to the btm side of the PCB, now I have to mask them in order to run this animal through the wave solder process. I know it w

modifying a pcb?

Electronics Forum | Sat Mar 19 20:59:57 EST 2005 | nate

i have a bit of a problem. i need a 320x240 lcd with a 5.7" screen, and a max width of 146mm. i have checked with about a dozen manufacturers and 148mm is the smallest they make without custom designing the pcb, and this is prohibitively expensive. w


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