Hello Khun Kritsada and Tokyo Coil Engineer Team,
Thank you for your strongly effort/support and expedite performed analysis both concerned with Inductor SMD Choke Coils Devices[MFG PN: SHP0420P-F1R5A] with
original packaging and representative damage/knock off on top side package that shipped back to Tokyo Coil Engineer[Thailand].
We understand an experiment result apparently that Inductor SMD Choke Coils Devices[MFG PN: SHP0420P-F1R5A] classified as No Trouble Found [NTF] and meet component specification per below enclosed analysis report.
We shall be discuss internally with QE/Process Engineering Team on this important subject matter. Any further more technical information need support would be revert back in shortly.
In Summary: The returned units were subject visual inspections.
Ø Confirm re-inspection 1000 pcs. Lot retuned by customer à It was just stain little on pot core NOT impact of product.
Ø Condition After reflow test + Drop test (12 cm)(Confirm group the risk after customer comment) à No abnormal found.
Ø Condition upside down + reflow test result (Confirm group the risk after customer comment) à No abnormal found.
Ø Condition After reflow test + Drop test (12 cm) 50 pcs. (for without circle’s dirty on top side) à No abnormal found.
Ø Condition upside down + reflow test result 50 pcs. (for without circle’s dirty on top side) à No abnormal found.
Ø The strength test result confirm product 50 pcs. à No abnormal found.
Ø Confirm reflow test result for check the abnormal in product 50 pcs. (Check the side effect in product pot core up check by Electrical check before and after reflow 2 time test) à No abnormal found.
Base on investigation/experiment performed, The returned devices are classified as no trouble found (NTF) and the return is invalid.
Note: Holding time after drying by high temperature of product customer please control. The holding time get cool , product strength 35 sec, Or more before running next process.(Refer report No.ER15-PE-048)