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