Electronics Forum | Sat Mar 21 16:33:09 EST 1998 | Earl Moon
| | | Cpk's on top flight ovens (e.g., Conceptronics, Heller, Electrovert, Vitronics) vary wildly, from 1 to 2+, between different supplers. The suppliers don't seem to understand Cpk's. A supplier's rep whose oven has a Cpk of 1.0 told me: | | 1.
Electronics Forum | Wed Jun 28 12:37:05 EDT 2000 | Brian W.
HASL plating, by its very nature, is inconsistent in terms of thickness and consistency. The plating varies from spot to spot on the pad, as well as pad to pad. This will wreak havoc on your screen printing process and your placement. From talking
Electronics Forum | Tue Mar 19 11:54:08 EST 2002 | davef
FORMULA OTHER THAN LxBxZ? - Paste is X% [X=~50] metal by volume. Your paste supplier knows the value of 'X'. HOW TO ACHIEVE A CONSTANT REFLOW PROCESS CAPABILITY? - Buy a capable oven, operate and calibrate it properly.
Electronics Forum | Wed Apr 03 18:31:54 EST 2002 | davef
To date, much of this discussion has focused on determining the volume of solder paste. That is but one piece of the measurement of process capability. The other aspect that needs to be evaluated is: an assessment of the accuracy of the positioning
Electronics Forum | Thu Apr 04 09:22:35 EST 2002 | itempea
What are the normal control limits in the industry, for a well controlled process, using a 6 mils stencil? Should they be different according to the surface finish (higher UCL for ENIG, Im SN, etc, lower UCL for HASL)? Thanks, Ioan
Electronics Forum | Mon Oct 26 15:59:38 EST 1998 | carlm
| What are the key feature to look for in buying a profiling product for Reflow ? | | Who's is the best and how much do these systems cost ? | | Thanks in advance. | | Hi Mark, I am currently the oven sector engineer for a large CM. I spend a lo
Electronics Forum | Tue Jun 30 11:12:19 EDT 1998 | Justin Medernach
| | | WHAT IS THE BEST ANGLE FOR THE SQUEEGEE BLADE TO BE ANGLED AT? WE ARE USING 45 DEGREE ON OUR POLYURETHANE BLADES, AND I BELIVE WE HAVE THE OPTION OF EITHER 45 OR 60 DEGREES ON OUR METAL BLADES. WHICH OF THE TWO IS BETTER, OR SHOULD WE BE USIN
Electronics Forum | Tue Jun 30 15:02:55 EDT 1998 | justin
| | | | WHAT IS THE BEST ANGLE FOR THE SQUEEGEE BLADE TO BE ANGLED AT? WE ARE USING 45 DEGREE ON OUR POLYURETHANE BLADES, AND I BELIVE WE HAVE THE OPTION OF EITHER 45 OR 60 DEGREES ON OUR METAL BLADES. WHICH OF THE TWO IS BETTER, OR SHOULD WE BE US
Electronics Forum | Fri Jul 03 09:19:21 EDT 1998 | Dave F
| | | | | WHAT IS THE BEST ANGLE FOR THE SQUEEGEE BLADE TO BE ANGLED AT? WE ARE USING 45 DEGREE ON OUR POLYURETHANE BLADES, AND I BELIVE WE HAVE THE OPTION OF EITHER 45 OR 60 DEGREES ON OUR METAL BLADES. WHICH OF THE TWO IS BETTER, OR SHOULD WE BE
Electronics Forum | Wed Mar 20 11:36:50 EST 2002 | slthomas
Are you saying L x W x H didn't answer his question? Unless he wants to know how you're verifying that the post reflow fillet is adequate (which is determined by his pad size as well as your print process and the % metal of your paste), I don't get
