HELLO TECHNETERS
GOOD FRIDAY TO YOU ALL
I HAVE A PROBLEM THAT I AM HOPING SOMEBODY CAN HELP WITH. I HAVE A FLEX
CIRCUIT BEING HOTBAR SOLDERED TO A PCB. THERE ARE COMPONENTS UNDER THE FLEX
CIRCUIT. THIS CAUSES THE FLEX TO EXIT THE SOLDER JOINT AT ABOUT A 30 DEGREE
ANGLE. WE ARE PRESENTLY HAVING FAILURES IN THE SOLDER JOINTS OF THE FLEX TO
PCB. THE COMPONENTS UNDER THE FLEX STRIP ARE WELL PLACED (FILTER CAPS).
MOVING THESE PARTS COULD CAUSE THE PCB NOT TO PASS EMC TEST. THESE
ASSEMBLIES GO INTO AN ENVIROMENT THAT HAS A LOT OF VIBRATION INVOLVED.
1) IS THIS 30 DEGREE ANGLE A REAL PROBLEM ?
2)IS THERE POSSIBLY MORE THAT I SHOULD BE LOOKING AT?
3)IS THERE A WAY OF SOLVING THIS PROBLEM WITHOUT MOVING THE COMPONENTS
ALL COMMENTS GREATLY APPRECIATED
THANKYOU
JOE KEARY
SR. PCB DESIGNER
SYSTRON AND DONNER
---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------