Category:PCB Assembly PCB Assembly Service

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In assembly the bare board is populated with electronic components, called a "printed circuit board assembly" (PCBA). In through-hole technology, the component leads are inserted in holes surrounded by conductive pads; In surface-mount technology (SMT), the component is placed on the PCB so that the pins line up with the conductive pads or lands on the surfaces of the PCB.

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help me troubleshoot tombstoning? Reply 2017-03-01 02:01:43
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mbetz

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Hi,
Has anyone who's using vapor phase process able to help me troubleshoot tombstoning? I raed about uneven forces during reflow due to misalignment, pad design, paste volume deposition unevenness due to dirty stencils, worn stencil printer parts such as squeegee, etc. but there was an article that pre-heating using an IR will minimise and sometimes eliminate the problem. How true is this? Has anyone had this experience with a Vapor Phase oven fitted with IR Pre-heat?
Thanks in advance and best regards.
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alejandro.rostro

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Really appreciate your content.I hope you write again soon.
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