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Conformal Coating Process Control & Inpection

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SMTA-64315913

#85186

Conformal Coating Process Control & Inspection | 10 July, 2020

Can you share some information relative to these questions about your conformal coating process: 1) What process controls do you use for conformal coating? 2) Do you perform manual conformal coating inspection? 3) Do you use AOI for inspecting conformal coating? 4) Do you check conformal coating thickness using AOI?

Thanks for sharing:)

This message was posted via the Electronics Forum @ SMTASMTA

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#85195

Conformal Coating Process Control & Inspection | 13 July, 2020

1) Viscosity measurement of the coating prior to spray, spraying and charting metal coupons for sprayed and cured thickness of the coating at various points of the conformal coat run

2) Yes, manual inspection

3) No, it wasn't able to inspect with the degree of scrutiny we needed for our process/coverage requirments

4) No, metal coupon and calipers is the most reliable (and cheapest) way to measure cured coating thickness, IMO

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#85209

Conformal Coating Process Control & Inspection | 15 July, 2020

Dear Sir: We have the coating machine with good performance and price for market promotion. We have been producing the SMT machines and intelligent equipment for many years, integrated Design, R&D, Production, Sales and Technical Service. What products we manufactured are: SMT Printer/Stencil Printer/Solder Paste Printer, Pick and Place Machine, SPI/AOI, Reflow Oven, Wave Soldering, Coating Machine, Glue Dispenser, Insertion Machine, Laser Marker, Laser Soldering Machine, Loader/Unloader, Conveyor and Tinning Machine etc. On the other hand, we are the agency of: HANWHA (SAMSUNG) Chip Mounter and Pick&Place Machine, HELLER, PEMTRON, SAKI etc., and dedicated to provide the customers with professional and comprehensive one-stop solutions of the electronic assembly line. Any inquiry would be appreciated by Mobile/WeChat: 0086 13063047785 or scan my WeChat QR code. Yours sincerely Wellman Rau Senior Manager International Business Dept. Mobile/Wechat/WhatsApp: +86 130 6304 7785 Skype: wellmanrau@yeah.net Email: wellman@htgdsmt.com ; wellmanrau@yeah.net Shenzhen HTGD Intelligent Equipment Co., Ltd. Website: http://www.htgdsmt.com

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#85239

Conformal Coating Process Control & Inspection | 20 July, 2020

Tape test to check adhesion and multiple point thickness test - each board has 5 points per side documented for thickness testing & we measure pre & post coating thickness with an electronic meter. Also temp & humidty are also logged, and alarms go off if close to process limits. Coating is manually inspected under UV. We looked at machines, but was warned off by experts I trust implictly.

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Lou

#85412

Conformal Coating Process Control & Inspection | 7 August, 2020

There is too much variation in the different Conformal Coating types and application requirements that you will get many different answers. Your controls will be tailored to the job requirements. My controls for parylene coating aerospace product is different from the silicone coating of class 1 product. Feel free to email me if you have specific questions on your specific methods.

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