The customer solder can joint this defect on both top & bottom of trough hole. There was a material like ink blocked in between the nodule appear. The general characteristics of this defect will covering core or conduct, didn't like this.
The customer solder can joint this defect on both top & bottom of trough hole. There was a material like ink blocked in between the nodule appear. The general characteristics of this defect will covering core or conduct, didn't like this.