Patent ID: 8698007
Filing Date: 2014-04-15
Classification: G02B,H05K

Abstract:
1. A printed circuit board comprising: an insulating substrate having a guide hole; a solder resist layer coated on an upper surface of the insulating substrate; and a semiconductor element connection pad arranged on the upper surface of the insulating substrate, connected to an electrode of an optical semiconductor element, and having an outer periphery covered with the solder resist layer and a central portion exposed in an opening formed in the solder resist layer, wherein a penetrating window that transmits light is arranged in the insulating substrate at a position facing a light-receiving or light-emitting unit of the optical semiconductor element; and the solder resist layer includes a positioning hole having a diameter smaller than that of the guide hole and arranged at a positioning accuracy of ±15 μm or less with respect to the opening above the guide hole.