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LM6211: 引脚做工疑似二次镀锡,侧面漏铜,塑封有裂纹,表面不一样

Part Number: LM6211

塑封料有微裂纹,器件表面有助焊剂,引脚疑似二次镀锡且侧面漏铜;

问题同上一张

问题同上,本次购买2033批次,问题更加严重

2109和2033表面均有字母,但2132表面没任何英文字母(上次购买),还请告知具体原因