Optical communication module

• US 20070166050A1
• Filed: 02/04/2005
• Published: 07/19/2007
• Est. Priority Date: 02/05/2004
• Status: Abandoned Application

• Current Assignee: ROHM Co., Ltd.
• Original Assignee: ROHM Co., Ltd.
• Inventors: Fujino, Junji, Horio, Tomoharu
• Application Number:
  US10/586,956
• Publication Number:
  US 20070166050A1
• Time in Patent Office: Days
• US Class Current: 398/164
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 31/167 the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers

Abstract

An infrared communication module (A1) includes a sealing resin member (5) formed with an inclined surface (5b) positioned adjacent to a lens (5a) and inclined in both of the x direction in which an LED (2) and a photodiode (3) are arranged side by side and the y direction extending from the LED (2) to the lens (5a). The light refracted upon passing through the inclined surface (5b) is received by the photodiode (3). With this arrangement, the size of the infrared communication module (A1) can be reduced.

Claims

1. An optical communication module comprising:

a substrate;

a light emitting element and a light receiving element mounted on the substrate; and

a sealing resin member that is transparent to light emitted from the light emitting element and covers both the light emitting element and the light receiving element;

the sealing resin member being formed with a lens facing the light emitting element;

the sealing resin member being further formed with an inclined surface that is adjacent to the lens and inclined with respect to both a first direction in which the light emitting element and the light receiving element are arranged side by side and a second direction extending from the light emitting element to the lens;

the light receiving element being arranged to receive light refracted in passing through the inclined surface.

2. The optical communication module according to claim 1, wherein the inclined surface is inclined in the first direction so that the inclined surface becomes closer to the substrate as proceeding away from the lens.

3. The optical communication module according to claim 2, wherein the inclined surface is entirely or partially curved convexly as viewed in the first direction.

4. The optical communication module according to claim 1, wherein the inclined surface is inclined in the first direction so that the inclined surface becomes farther from the substrate as proceeding away from the lens.

5. The optical communication module according to claim 1, wherein the lens projects in a direction to become farther from the substrate than the inclined surface is.

6. The optical communication module according to claim 1, wherein the light emitting element emits infrared light, whereas the light receiving element receives and detects the infrared light.