Electronics Forum | Thu Apr 15 14:56:43 EDT 1999 | Dave F
| Can anyone suggest or identifiy standards which tabulate the following: | | Conductor width, cross sectional and area conductor thickness for PCB's carrying up to 70 Amps? | Barry: Check: 1 Printed Circuits Handbook (Clyde F. Coombs) 2 Microel
Electronics Forum | Tue Dec 15 17:01:36 EST 1998 | Chrys
| Does anyone know what a TCP is? | What type of process is required for assembly, what type of equipment? | | Any help or resources on the subject would be greatly appreciated.. | | Thanks | Brain, TCP, or tape carrier package is the same as TAB
Electronics Forum | Thu Jan 04 12:51:37 EST 2007 | Board House
Hi Chunks, Starting copper on outer layer with .0007 is 1/2 oz. copper foil. so if starting copper is .0007 and your Board house will plate an additional .0021 mils of copper. which will give you a finished copper weight of .0028 Mils or (2 oz.) Y
Electronics Forum | Fri Jul 04 21:09:04 EDT 2003 | ramanandkini
I have a CEM-1 PCB board with 35 microns copper. This is PCB is finished with SMOBC+HALS. We do solder SMT LEDs, but till date we do not have problems that you have listed. The LEDs are good & bright. It even passed high & low temp cycle tests (-40 t
Electronics Forum | Thu Feb 12 17:14:49 EST 2004 | Jim
Replying to mine own thread for clarification. We are having some issues with solder mask shifts on memory boards using fine pitch BGAs. At times the etch to etch distance does not leave room for a solder mask annular ring to be shifted or it will c
Electronics Forum | Tue Jan 26 12:18:38 EST 2010 | smt_guy
what made us to try it? after testing most general degreases including some electronic degreasers in spray can from reputable manufacturers without having success in achieving a clean and shiny (no stain) surface. we do not want to re-etch or use et
Electronics Forum | Wed Mar 04 22:24:28 EST 2015 | SKR
We are using Nutek NTM4910-XL laser marker to etch 2D barcode on all our boards. We added solid silkscreen box on all our boards to create contrast. When we laser etch them, we just burn the silkscreen box so that we can see the soldermask under it c
Electronics Forum | Thu Jun 08 22:54:31 EDT 2006 | hunghung
Dear all, If a PCB board, 2 mils of core with 1oz copper at the top and bottom, is it a good board to be fabricated? will it be caused warpage during etching for inner layer process? if yes, what is the real factor caused to warpage? How to solve t
Electronics Forum | Wed Jul 22 06:58:50 EDT 2015 | migliore
Hi, I got the answer from edaboard.com A standard 6-layer stack is using 2 cores. Manufacturing steps for standard 6-layer are: 1. Etch both (double side) core substrates 2. Assemble, press and cure the complete stack: - copper foil - prepr
Electronics Forum | Sat Apr 15 00:10:52 EDT 2023 | sarason
Having worked in a hybrid maanufacturing operation many years ago, yes stencils are great and have the required accuracy, but on the down side there were 2 operators that were absolute wizzes at turning them out and that could mean up to 20 stencil
