Zhejiang Dusun Electron Co., Ltd
Zhejiang Dusun Electron Co., Ltd
Floor 8, Building A, Wantong Center
Tel: 86-571-86769027/8 8810480
Hangzhou, China
Website: www.dusuniot.
www.dusunremotes.com
www.dusunlock.com
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Alarm temperature: 130℃
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SMT placement ready temperature after natural cooling: < 36℃
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Number of drying times: 1
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Rebaking condition: The module is not soldered within 12 hours after baking.
5. Do not use SMT to process modules that have been unpacked for over three
months.
Electroless nickel immersion gold (ENIG) is used for the PCBs. If the solder pads
are exposed to the air for over three months, they will be oxidized severely and
dry joints or solder skips may occur. Roombanker is not liable for such problems
and consequences.
6. Before SMT placement, take electrostatic discharge (ESD) protective measures.
7. To reduce the reflow defect rate, draw 10% of the products for visual inspection
and AOI before first SMT placement to determine a proper oven temperature
and component placement method. Draw 5 to 10 modules every hour from
subsequent batches for visual inspection and AOI.
6.1
Recommended oven temperature curve
Perform SMT placement based on the following reflow oven temperature curve. The
highest temperature is 245
℃
.
Based on the IPC/JEDEC standard, perform reflow soldering on a module at most
twice.