April 2010 Vol. 2, Iss. 30
APEX was a mixed bag this year. While the show floor traffic was again light and the space taken up by exhibitors seemed to shrink again, there were several returning exhibitors who sat out last year. There were more customers in a buying mood attending the show. In terms of conferences and technical sessions the programming was of a high caliber and even the Friday afternoon sessions were well-attended.The IPCA-610 and the JSTD-001 new revision are now available for sale.BEST will be scheduling information sessions highlighting the new features of the the inspection criteria. Stay tuned.
Copper Dissolution and Rework
The high tin content in SAC lead free solder alloys has caused problems in PTH rework.
At elevated temperatures associated with SAC alloys solder fountains the dissolution rate of the high tin content solder system causes the walls of the PTH as well as the copper pads to dissolve.
Even with adequate preheating of the board which will reduce the dwell time in the solder fountain, the dissolution, especially around the "knee" of the PTH, gets thinned out to a point where the reliability of the connection is extremely compromised.
These problems can be mitigated by :
Using a different alloy for rework with dissolution rates lower tha that of the SAC alloy
Using a a heating system such as hot gas rework or IR or laser rework heating sources
Contact BEST to see if we can help you solve this problem...... Call Laura Ripoli at (847) 797-9250 to see if we can help.
There are other good tablet PCs?
Now that IPAD has garnered all of the PR the question is should you buy this if you are an early adopter. There are numerous shortfalls including lack of support for flash, no external memory support and problems supporting WiFi connections.
|TABLE OF CONTENTS|
|Copper Dissolution and Rework|
|BEST ITAR Registration Process in the Works|
|StencilMate(TM) Leadless Device Rework Stencils|
|Repair and Testing Services|
|BUY your copy the the NEWLY RELEASED Versions of IPCA-610 or JSTD-001 REV E |
|Order either a copy of the IPCA-610E including updated criteria with respect to wire and terminals, bottom-terminated devices or the new JSTD-001 REV E. |
|Schedule the New BEST Mobile Training Center|
|Featuring a richer training experience as students are "sequestered" inside of a training environment, all of the training tools and materials come to you and the BEST professional, practical instruction. Call Katy Radcliff (847) 797-9250 to schedule. |
|Free Evaluation Kit of Leadless Device Rework Stencil |
|If you want to simplify the rework of your leadless devices then try out the BEST StencilMate(TM) here.|
|VOCAB- Word of the Month |
chicanery"shi-KAY-nuh-ree" which is a noun;
The vocabulary you use tells others your level of intellect.
Definitions: Deception by trickery or sophistry.
Usage: "Some analysts are claiming that these arrests [of Taliban members] are not good news at all, but merely evidence of still more too-clever-by-half chicanery by Pakistan's Inter-Services Intelligence"
|ASK THE EXPERT|
|Ask our team of experts a question on your rework or process problems. Ask here |