Electronics Forum: 218 (Page 4 of 9)

Re: Chip on board - board metalization

Electronics Forum | Mon Jan 08 20:26:12 EST 2001 | Dave F

Ask your supplier if he will guarantee to cover rework, warranty, and lost business costs, if he's incorrect. Below 2uinch gold is very pourous and not worth anything in preventing corrosion of your nickel undercoat. 3 uinch has to be the absolute

Re: Stencil Cleaner

Electronics Forum | Tue Aug 29 12:22:36 EDT 2000 | Mike Konrad

I�m sure others will spew out commercials as a response to your question, but I�ll refrain. Stencil cleaner manufacturers include: Aqueous Technologies (800) 218-8128 www.aqueoustech.com PMR (480) 829-8170 www.pmrsystems.com SmartSonic (818) 909-6

Researching stencil cleaners

Electronics Forum | Tue Mar 27 15:15:32 EST 2001 | Mike Konrad

SmartSonic states that they will not sell their 440R chemistry unless it will be used with their machines. But to answer your question, the following manufacturers make ultrasonic stencil cleaners compatible with 440R and many other chemistries. Aq

Re: DE-IONIZED WATER SUPPLIERS

Electronics Forum | Fri Sep 10 09:49:49 EDT 1999 | C.K.

1 MOHM, 18 MOHM)? | | What state are you located? | | What type of volume will you use (1 drum per week, month, year)? | | Mike | (800) 218-8128 | We are located in Illinois (Southwest Suburb of Chicago). Our usage will probably be in the 1 dru

Re: ionograph testing

Electronics Forum | Tue Jul 27 13:50:52 EDT 1999 | Mike Konrad

Aqueous Technologies manufactures the Zero-Ion ionic contamination tester. The Zero-Ion utilizes dynamic-based technology and has been assigned the highest equivalency value by the NAWC. It is among the most sensitive of all of the military-approved

Re: Opinions on in-line wash equipment?

Electronics Forum | Tue Jun 22 12:55:45 EDT 1999 | Mike Konrad

You may want to rethink using an inline for both OA and No-Clean applications. Since the majority of your applications are OA, it would not make a lot of economic sense to run saponifier in your inline for a minority application. My suggestion is t

Connector leads plating

Electronics Forum | Tue Dec 10 19:30:49 EST 2002 | Vijay

Hi Dave, The peak temp on the leads is 216-218 Deg C and duration above MP (179 degC) is 55-60 sec. Alloy(solder paste) used 62 Sn,36 Pb 2Ag (Alpha WS 609 Ty 3 Water eash) This is a SMT connector wth Gulwing leads Gold plating on the PCB is 2-5 micr

Lead-free solder

Electronics Forum | Wed Apr 14 20:24:48 EDT 2004 | Ken

What do you mean the solder must "survive" 260C? What is your target temperature? Is it dictated by a component, the substrate or the solder alloy? Do you require a eutectic alloy? If not, the selection of alloys grows. (these are from memory...n

0402 tombstoning and dewetting on QFP256 trade-off

Electronics Forum | Thu Mar 12 06:37:48 EDT 2009 | gregoryyork

I agree you are too cold for the profile get it up to 230C and possibly allow it to dwell a little longer in preheat as opposed to pushing up the reflow zone only. Sn90/Pb10 melts at 220C so 2C hotter than your profile so you are reliant on it alloyi

blowholes in SMT process

Electronics Forum | Fri Mar 20 05:07:16 EDT 2009 | rocko

Hi All, I was puzzled because of terrible blowholes in solder joints of gold plated odd-form components. I am very confused because all other components on the boards have perfect solder joints. Here are some process details: 1) Solder paste: N


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