Electronics Forum | Sat Apr 25 07:10:01 EDT 1998 | JoSi
Hi, A collegue of mine, working on incoming inspection departement, asked me if I know any good standard,preferrable on CD-ROM with high-quality images of different defects that can be found on bare pcb`s. I know IPC-standards, but is there any
Electronics Forum | Fri Feb 27 10:54:38 EST 1998 | Earl Moon
REVISITING MULTILAYER DIMENSIONAL STABILITY AND LAMINATE INTEGRITY It has been said we must learn it all over again and again about every four years. I know Lee Ritchey said that to me about high speed digital circuit design. The same seems true for
Electronics Forum | Tue Feb 12 10:33:45 EST 2002 | davef
IPC-4101 - Specification For Base Materials For Rigid And Multilayer Boards replaces MIL-P-13949 - Plastic Sheet, Laminated, Copper-Clad (For Printed Wiring) Taking a broader look, there are many �Obsolete MIL Document To Commercial Document� replac
Electronics Forum | Sat Nov 23 08:10:43 EST 2002 | jax
BS4292: Electroplated Coatings of Gold and Gold Alloys Gold and gold alloys for engineering purposes Single, double or multilayer electrodeposited coatings on metallic and non-metallic materials for electrical, electronic and other engineering appl
Electronics Forum | Thu Feb 27 03:26:13 EST 2003 | damianlai
Hi, I would appreciate some advice / recomendations regarding conditioning of PCB's before use. Our standard PCB's are double sided and rigid multilayer FR4. We are currently baking everything over 3 months old for 2 hours at 125 degrees C. Is thi
Electronics Forum | Mon Oct 13 10:30:49 EDT 2003 | markhoch
PCB is 12.25" x 4". There are large MOSFETS on the board. Two large Electrolytic Caps. Two Large Multi-Layer Ceramic Caps. 15 C Size Tantalym Caps. A fair number of IC's, (SO-8's, SO-16's). No BGA's or finepitch of any kind. The board is double sided
Electronics Forum | Mon Sep 26 20:10:58 EDT 2005 | Anna
What type of alloy and at what temperature do you use for wave soldering? Do you need to modify your machine? I am using SCN but I have problem controlling my bath. Are you running on multilayer board or PTH boards? Do you face any fillet lifting
Electronics Forum | Fri Apr 15 11:16:03 EDT 2005 | HOSS
It's a longshot but.....I have seen low-standoff parts move caused by via's under the part erupting from within internal layers (outgassing). If this is a multilayer PCB and vias are not well plated or pourus, they can and will expand when heated.
Electronics Forum | Thu Jun 02 11:16:23 EDT 2005 | JH
I concern about the Through Hole soldering as well. Currently, we have encountered some problems of Multilayer from Through Hole soldering. The root-cause is probably related to PCB Finish, machine setting, Thermal relief Pad or hole and something e
Electronics Forum | Thu Jun 09 10:41:30 EDT 2005 | HOSS
Can anyone recommend a flex/rigid-flex supplier stateside that can do the following: Build to IPC class III (not necessarily certify) Multi-layer Controlled Impedance 2-4 week turn without price premium Take less than 1 week to quote Any info appre
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