| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a semiconductor light receiving element which is applicable to a device for optical communications, optical information processing, optical instrumentation, etc. and can receive light in high efficiency and at high speed. <P>SOLUTION: The semiconductor light receiving element is used to ensure high-speed response without reducing optical coupling efficiency. It is provided with an i-type light absorbing layer and a p-type window layer in its structure, and it is furthermore provided with a plurality of open-hole areas up to the i-type light absorbing layer from the p-type window layer within a light receiving plane. Thus, the capacity of an element, namely, a pn joint area can be reduced without reducing a light receiving area. An optical carrier producing in the open-hole areas travels while being accelerated by micro electric field, so that no significant degradation of efficiency occurs due to surface re-joint, and optional high speed characteristic can be ensured by designing the width of an open hole in consideration of travelling time. <P>COPYRIGHT: (C)2007,JPO&INPIT |
