Circuit World - Emerald - Quarterly - Vol. 44, No. 4,, 2018 This paper aims to investigate and document the effects of copper-clad laminate (CCL) inorganic filler on the hole performance in printed circuit boards drilling process ISSN: 0305-6120 Subjects--Topical Terms: LC Class. No.: https://www.emerald.com/insight/publication/issn/0305-6120/vol/44/iss/4