Electronics Forum: (4) (Page 85 of 631)

Re: Misalignment Issue (CAD Vs. Machine Variables

Electronics Forum | Tue Nov 14 14:19:01 EST 2000 | Claude_Couture

Hi George! Is your CAD in inches and your equipment metric by any chance? If so, make sure your CAD data is converted to metric using at least 4 digit after the decimal (0.1234" for example)

Re: PCB delamination

Electronics Forum | Mon Feb 05 09:21:22 EST 2001 | pteerink

Talking about delamination...... I have a customer requesting info about the max temperature ratings for FR4. Can anyone point me to a good source? ( and yes, I HAVE checked the archives, to no avail.....) Phil

COB module design / layout

Electronics Forum | Thu Oct 26 14:41:33 EDT 2000 | Derek Vanditmars

We are planning on replacing a SMT 100Pin QFP with a COB module that will have two dies that are functionaly equivalent to the old part that will not be available. Questions: 1)Suggestions on substrate material FR-4 or something better? 2)Are there d

Re: COMPONENT LIBRARY

Electronics Forum | Fri Nov 17 11:05:15 EST 2000 | Mika Johnsson

There is such a web based library that includes data that you describe. It has currently about 4 million parts and 45 000 packages. Contact me and I tell you more

Adhesive Dispenser Vs. Screen Printing Adhesives Pros and Cons

Electronics Forum | Tue Oct 03 07:48:52 EDT 2000 | steveZ

Had cheacked the archives but I didn't see much about their comparison: 1. Throughput 2. Rework Rate 3. Effect on Placement Accuracy 4. Cost (cheaper or more expensive in the long term?) Has anyone compared the above. Please help me.

Re: Cooling racks

Electronics Forum | Fri Sep 22 06:59:45 EDT 2000 | jackofalltrades

For several years now we have been using a short (4 feet) conveyor with brush wheels and a simple box fan mounted under it (blowing up) to cool the product.

After PCB CLEANING with acqueous , drying needs?

Electronics Forum | Tue Sep 05 04:19:23 EDT 2000 | P.GERARDIN

We intend to promote the new PCB cleaning process with acqueous chemistry , but we face with an important demand : Do we have to dry the pcb after ? Wich is the treshold humidity content to avoid any risk for FR4 material ? Regards Pascal

Solder paste storage

Electronics Forum | Thu Aug 10 14:10:06 EDT 2000 | Alvaro Carrillo

Hi everybody, somebody know a refrigerator to storage solder paste with the folowing characteristics. 4 glass door with a system that keep the refrigerator in control showing the temperature in a display that be part of the refrigerator. any help to

Step Stencil

Electronics Forum | Sat Aug 05 03:09:54 EDT 2000 | Felix

Dear Netters, Could anybody kindly advise : 1. what step stencil means 2. what are its characteristic ?? 3. What special process makes it? 4. What is the application ?? 5. Advantages and limitation ?? just short breifing is enough. Thanks Best

Non-halogenated PCB

Electronics Forum | Wed Jul 19 11:06:42 EDT 2000 | polymer

Where can I find laminates containing non-halogenated PCB? I'm especially interested in FR-4 and CEM-3, 1.6 mm 25um. Thanks in advance! Dr. Lennart Johansson Polymer Support


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