Isikali semakethi yokusetyenzwa kwelaser sibonakala sikhula ngokucothayo kule minyaka mibini idlulileyo. Nangona kunjalo, kukho imakethi enye yelaser esaphuhlayo ngesantya esikhawulezayo-i-PCB ehambelana nemarike yelaser. Ke injani imakethi yePCB yangoku? Kutheni le nto inokuzisa uphuhliso olukhulu kushishino lwelaser?