Patent ID: 8138027
Filing Date: 2012-03-20
Classification: H01L

Abstract:
1. A method of making a semiconductor device, comprising: providing an optical semiconductor die having an optically active area that generates electrical signals in response to the optically active area reacting to light; providing a leadframe having a dam bar and a plurality of contact pads formed as fingers that extend away from the dam bar; disposing a light transmitting material around the fingers and between the dam bar, the light transmitting material including an elevated area vertically offset with respect to the leadframe; attaching the optical semiconductor die to the leadframe so that the optically active area of the optical semiconductor die is aligned with the light transmitting material to provide a light transmission path to the optically active area; and disposing an underfill material around the light transmission path and between the optical semiconductor die and leadframe such that the underfill material contacts a sidewall of the elevated area.