Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

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Special PCB finishing require for BGAs ??

Stuart Adams

#16474

Special PCB finishing require for BGAs ?? | 23 March, 1998

Do I need to specify any type of special finishing to my PCB manufacturer when having boards fabbed that contain BGA footprints ??? Thanks, Stuart

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Justin Medernach

#16475

Re: Special PCB finishing require for BGAs ?? | 24 March, 1998

| Do I need to specify any type of special | finishing to my PCB manufacturer when having | boards fabbed that contain BGA footprints ??? | Thanks, | Stuart No special finish is required. I have assembled boards with BGA population that had HASL, OSP, and Au/Ni finishes. All worked fine. HASL is preferable as there are less solderability suprises. Regards, Justin Medernach Flextronics Int'l PIC East

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Big Manny

#16476

Re: Special PCB finishing require for BGAs ?? | 1 April, 1998

| | Do I need to specify any type of special | | finishing to my PCB manufacturer when having | | boards fabbed that contain BGA footprints ??? | | Thanks, | | Stuart

Response: > I've had some field reliability and Accelerated Life Test (ALT) issues with BGAs on Entek coated Cu. > The best results so far are with Atotech coated Gold electroplate finish. > Solderability, for factory process, seems to be as described by Justin (previous response).

Big Manny Motorola Advanced Engineering Group

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