double sided pcb

"double sided pcb" search results in the Electronics Forums

12777 result s found for "double sided pcb" in the Electronics Forums

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Nov 14, 2006 | When we reflow solder SMT PCB with SMT Electrolytic capacitor- 5MM sized ,the capacitor gets burst and all other adjacent and surrounding components also get disturbed. What could be reason for this. What should be done to avoid this problem.

High TG?

Nov 13, 2006 | Tg, by definition is the glass transition temperature for materials. It's the temperature where your board goes from rigid to "rubbery". Not sure if a higher Tg would help prevent delam. One of the PCB experts of the forum might know this.

removing glued chips

Nov 8, 2006 | at present we try to do it with hot-air gun adding flux below the chip while heating. but in most cases the PCB gets damaged while doing this. sorry again for late reply.

Glass Wicking

Nov 4, 2006 | Can someone educate me what is 1)glass wicking failure on PCB 2)Crack of TH Barrel How it happens and how this can be rosolved?

Local Fiducials

Oct 19, 2006 | to use local fids such as this you must use the cad data, when the machine knows where it is supposed to be and seeks there it reads where it (PCB) really is and then corrects the machine, it does not have to be symetrical at all. If you teach fids on a skewed board you get skewed placements

pcb smt pad replacements

Oct 17, 2006 | ya don't need no stinkin pads. just run sum fine gauge insulated jumpah wires from da I.C. legs (da

RoHS Compliant PCB Repair Kit

Oct 6, 2006 | i am using RE-7500 from Jovy Systems... they write on the machine "Lead Free Combaible" , you can c

Board Delamination

Sep 29, 2006 | AJ, I believe all of your questions are best answered by your pc board supplier. The answers will vary depending on pcb material, thickness, humidity level in your shop, etc. Too many variables to consider for a generic answer.

RoHS Compliant PCB Repair Kit

Sep 27, 2006 | Why yes you do!!! Now you know if you make someone put RoHS compliant on their packaging that we wi

MPM AP25 Print Repeatability Problem

Sep 24, 2006 | One wood agree the offset you are seeing is enormous and probably PCB tooling related. However, if this is ruled out you should have the C-tool to verify your cube alignment. Who knows, maybe your cubes are loose?

Shipping PCB via Sea Containers

Sep 18, 2006 | We don't know the information you require, but can give you the names of packaging consultants.

How do you clean OSP PCB's without washing it off?

Sep 14, 2006 | Is it your normal process to wash all your bare boards or is this in response to something abnormal?

Auomotive: Conf Coating

Aug 31, 2006 | Hello, which is the most reliable and suitable resin (AR, ER, UR, SR) to coat automotive Assembled PCB (PBAs) ? Your experience and advices will be appreciated. Thank you Best Regards...........GS

BGA Solder Acceptance Criteria

Aug 25, 2006 | For FR4 ENIG PCB: 1. In a normal condition, what is the broken location after BGA peeled off?(FR4 layer or Ni layer or solder ball) 2. What is the soldering acceptance criteria for BGA in CMK?

Lead-free PCB: After Effect

Aug 25, 2006 | Hi Board House, Thank you for your inputs. Do you see the similar problems to flex circuits ma

Board router.

Aug 22, 2006 | Does anyone have experience using the Seika/Sayaka PCB routers. Model SAM 23/26 or 56NJ? Good, bad, or ugly. Thanks.

materials in pcb

Aug 18, 2006 | There's a fair amount on the web about this. For instance:

PCB open trace repair

Aug 8, 2006 | Since we build produt and co not repair, we send our damaged boards to a place that specializes in b

pcb machinery

Aug 5, 2006 | Start here:

Where can I discuss PCB design tools on SMTnet forum?

Aug 3, 2006 | Here is a DipTrace user group:

Imm Silver & Screen Printing

Jul 31, 2006 | Never changed anytihgn when we switched to Immersion silver. Have run approximatelky 10,000 16mil pitch devices to date with immersion Silver PCB, stainless, chempolished 5 mil stencil, and pbfree paste (OM338). Russ

using gold on PCB pads

Jul 30, 2006 | Thank you for your help. Using gold is not my decision, it is my boss-I-know-everything's decision u

using gold on PCB pads

Jul 29, 2006 | The issue is not the gold, but the amount of gold. Gold content over 3 percent raises concerns abou

pcb manufacturing

Jul 28, 2006 | Don't forget about Paste height measurement, conveyors, Aqueous Cleaner, Selective Solder machine an

pcb manufacturing

Jul 28, 2006 | Do you mean making bare boards or populating bare boards. You post sounds like you mean the first b

pcb manufacturing

Jul 28, 2006 | Lets not forget Chemistries... Pastes, flux, solder, glue, underfil, Mask. Someone with manufactu

pcb manufacturing

Jul 28, 2006 | I might suggest a few books first roger, then a tour through a few Fab shops. Very aggressive and a

pcb manufacturing

Jul 27, 2006 | what machines do I need to satart a hi-tech printed circuit board production line with upto 16 layer

Extra Components found on the PCBs

Jul 20, 2006 | Hi Folk, recently we have found extra component (Stick onto the board) on the PCB. What is the cause of it...? Appreciate your help on this. Thks & Rdgs CKH

Flexi boards and uBGA

Jul 6, 2006 | Rob, do you have any tip on reliable supplier of "really flat" flexible pcb? We tried several but all with issues. Thank you. Pavel

Solder beads and wave soldering

Jul 5, 2006 | Likely causes of this are: -Preheat temp. too low -too much dross -uncured epoxy -PCB contamination ...also varify the solder flow over the wave is smooth.

Imm Silver and Voiding

Jun 22, 2006 | Hello, Has anyone had issues with voiding while using Imm Silver PCB finish. Does thickness of silver, contamination of the plating bath or other factors if you come point out cause voids due to the plating.

Need help for setting up an assembly line

Jun 21, 2006 | Earl Moon, how do I contact you? Your e-mail and PCB 007 site are down?

Fuji CP6-5 Servo Z overflow?

Jun 21, 2006 | problem solved. Some PCB table support pins were jammed down in the table preventing the Z axis from lowering all the way. The intial error mesage was x and y servo, but the real error was the z axis overflow. Rob


Jun 21, 2006 | Depending on the material, the etching can damage the dielectric. This can be manufactured but is di

PCB Type

Jun 21, 2006 | I think all silver on a bare board is Immersion. We are a bare board manufacturer and that is the o


Jun 20, 2006 | hung copper balance is really critical in your case. in the same configuration we have specifi

MPM Ultrapint series 2000

Jun 19, 2006 | Check for anything that may contact while activating Z tower (support, wire, connector, etc) I also saw one day a lost PCB causing that kind of problem ?!?!?!?

Black PAD

Jun 19, 2006 | Thanks very much! In fact, "Black PAD" phenomenon have been found in our product, the total BGA came off PCB during drop test. if we apply the underfill to BGA after SMD process, Could the underfill add reliablility of product?

BGA Underfill Rework

Jun 7, 2006 | This is true but even the so called reworkable underfill takes a lot of effort. We use a loctite reworkable that requires heat to soften the underfill. Once the component is removed we use acetone and a swab to scrub the pcb clean. This can be very time consuming.

BTU VIP98 Leadfree Recipe

May 26, 2006 | Cheers Samir, that was a great help! I've tweaked the settings a bit to suit our PCB and it works well. Thanks again.

BTU VIP98 Leadfree Recipe

May 26, 2006 | Thank you - The PCB weighs 192.9g and is 314mm x 228mm. Not very densly populated.

V-groove question

May 24, 2006 | They cut it dry. Most shops use a rotating blade, some use 'skiving' just pushing the PCB past a v shaped blade. Don't know how popular the latter is anymore though.

Palladium poor wetting

May 23, 2006 | Sorry I misled you. The PCB pads are wetting, but there is no fillet being formed. After reflow, it looks as though no paste was put down on the pads; however the paste print is fine. All other components solder real nice, it's only the Pd-Ag parts that won't solder. Steve

Palladium poor wetting

May 23, 2006 | Seems as though the problem is with PCB and not component? "Solder does not wet to pads, wets to component" What is your board finish? Russ

PCB market in Australia

May 16, 2006 | IPC [] publishes this type of information for US markets. They might be able to give you a c

Electronics Manufacturing in Morocco

May 7, 2006 | Dismon Electronica S.L. is situated in Spain and dedicates to PCB assembling both SMT and THT. You can visit and contact us if this is of your interest.

Pad dissolution on Thick PCB's

Apr 27, 2006 | This is similar to a previous posting here on SMTnet, where, as we recall, one response suggested us

Pad dissolution on Thick PCB's

Apr 27, 2006 | you can either use an alloy that has a higher copper content to reduce dissolution or the better opt

Jig for PCB

Apr 18, 2006 | We don't understand why your aluminum pallet requires high temperature. Is it that you don't want t

Non-heated dispensing system

SMT Assembly machines