Method of making through hole with laser, {TAIL ~ copper clad laminate} suitable for making hole, and auxiliary material for making {HEAD ~ hole} 
Method of making through hole with laser , { TAIL ~ copper clad laminate } suitable for making hole , and auxiliary material for making { HEAD ~ hole }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD