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Ming Chih Lin CSIST Nov. 04, 2004

PCB Layout or Check. Solder paste printing. Mechanics assembly(?). Coating QC Inspection. Spray Coating. T642 Glue Injection. Mask Pre- process. Cleanliness Test. PCA Function Test. QC Inspection. Solvent Clean. THT Process. Reflow. Pick and Place. Mask Post- process. . . . . . . . . . . . IPA Cl

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Ming Chih Lin CSIST Nov. 04, 2004

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    10. Glues used parts assembly CHO-THERM 1671 ( Used on DC / DC, JSBC Boards) RTV Silicone CV-2943 ( Used on DC / DC Boards) 3M Scotch 2216 B/A Gray ( Used on all kind Boards) CHOMERICS T642 ( Used on JPD Boards)

    11. Glues use before coating CHOMERICS T642 ( Used Boards have Actel part’s under injection)

    23. Assembly with heat sink, and fasten two or four screws, let too much T642 glue overflow

    24. Let the assembled (DC-DC part and heat sink) cure at a oven with 50? and 3 hours. Trimming overflow’s T642 glue.

    25. Assembly the unit (DC-DC part and heat sink) on PCB and solder part’s pin pads.

    26. Use this method to get a uniform thermal conduction membrane between DC-DC part and heat sink

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