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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polyester masking dots for conformal coating Reply 2017-02-28 16:02:49
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Juan Pablo Vales

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Looking into possibly receiving samples of polyester masking dots for conformal coating. Our usage of polymide dots have really increased in the past months and we're always looking for a reduction in costs. The only information I've found is that polyester tape has the same static properties of polymide at room temperature but can change with increased and decreased temperature.
Anyone familiar using polyester tape on assemblies? Any positive or negative experiences?
Polymide rolls of dots are at around $25 while polyster is at $14.
Specs- Conformal Coating Process using Dow Corning 3-1953 DIY Oven with three zones set at 225c for ~3minutes Assembly temps exiting the oven @ ~120c
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Statement: This post is only the personal view of the author and does not represent the opinions of ALLPCB.com.

Vratislav.michal

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Remarkable.Great help to my learning.

madeo

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Please keep doing your great job.

Eugene Shamaev

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Useful!

Bennett

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Great thanks for your helpful info. Really useful.
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