Good Morning,

I apologize for this long e-mail but I thought it best to try and provide as
much info as possible.

We have a customer who is experiencing voltage failures on the following
build :

S/M

.0007 Copper (pads layer)

.008 FR-4 (Isola 410)

.0007 Copper (pads layer)

.001 DuPont Acrylic adhesive (bag layer)

.001 DuPont FR Kapton (bag layer)

1080 pre-preg

.0005 DuPont kapton

.0005 DuPont Adhesive

.0007 Copper (signals)

.001 Kapton

.0007 Copper (signals)

.0005 adhesive

.0005 kapton

.0005 adhesive

.0007 copper (signals)

.001 kapton

.0007 copper (signals)

.0005 adhesive

.0005 kapton

1080 pre-preg

.001 kapton

.001 adhesive

.0007 copper (pads layer)

.008 FR-4

.0007 copper (pads layer)

S/M

 

Finish ENIG

 

Lines are .004-.005 and spaces .008. 

 

The part is run at 75 C , 90 % RH, with 300 volts run on line 1 , 0 on line
2 etc. Failures start to occur after approx. 48 hours and we think it is
track to track.

Any thoughts or suggestions would be appreciated.

 

 

 

 

Steve Kelly

PH: (416) 750-8433

FAX: (416) 750-0016

CELL: (416) 577-8433

 


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