Patent ID: 8263966
Filing Date: 2012-09-11
Classification: H01L,Y02E,Y02P

Abstract:
1. A photodetector comprising: a first conductivity-type InAs substrate; a first conductivity-type InAs buffer layer formed on the first conductivity-type InAs substrate; a first conductivity-type InAs light absorbing layer formed on the first conductivity-type InAs buffer layer; a cap layer formed on the first conductivity-type InAs light absorbing layer, and made from InAs a first inorganic insulating film formed on the cap layer; a second conductivity-type impurity semiconductor region formed by ion-implanting a second conductivity-type impurity via the first inorganic insulating film, and reaching from the cap layer to an upper layer of the first conductivity-type InAs light absorbing layer; and a second inorganic insulating film formed on the first inorganic insulating film.