Opto-reflector

• US 10,418,507 B2
• Filed: 12/08/2015
• Issued: 09/17/2019
• Est. Priority Date: 12/08/2015
• Status: Active Grant

• Current Assignee: New Japan Radio Company Limited (Nisshinbo Holdings Incorporated)
• Original Assignee: New Japan Radio Company Limited (Nisshinbo Holdings Incorporated)
• Inventors: Ohno, Fumiaki, Koike, Seiji
• Primary Examiner(s): Naraghi, Ali
• Application Number:
  US16/060,006
• Publication Number:
  US 20180366607A1
• Time in Patent Office: 1,379 Days
• Field of Search: None
• CPC Class Codes: G01S 17/46 Indirect determination of position data
• CPC Class Codes: G01S 7/4813 Housing arrangements
• CPC Class Codes: G01S 7/4814 of transmitters alone
• CPC Class Codes: G01S 7/4816 of receivers alone
• CPC Class Codes: H01L 2224/32225 the item being non-metallic, e.g. insulating substrate with or without metallisation
• CPC Class Codes: H01L 2224/45099 Material
• 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 2224/48465 the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 23/552 Protection against radiation, e.g. light or electromagnetic waves
• CPC Class Codes: H01L 24/32 of an individual layer connector
• CPC Class Codes: H01L 24/42 Wire connectors; Manufacturing methods related thereto
• CPC Class Codes: H01L 24/48 of an individual wire connector
• CPC Class Codes: H01L 24/73 Means for bonding being of different types provided for in two or more of groups H01L24/10, H01L24/18, H01L24/26, H01L24/34, H01L24/42, H01L24/50, H01L24/63, H01L24/71
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2924/12041 LED
• CPC Class Codes: H01L 2924/12043 : Photo diode
• CPC Class Codes: H01L 2924/15153 : the die mounting substrate comprising a recess for hosting the device
• CPC Class Codes: H01L 31/173 : formed in, or on, a common substrate
• CPC Class Codes: H01L 33/486 : adapted for surface mounting
• CPC Class Codes: H01L 33/54 : having a particular shape

Abstract

To achieve an opto-reflector in which a distance to a detection target is shortened to be able to detect the position of the closer detection target, and thereby contributing to the reduction of the arrangement space. The opto-reflector (10) includes a plate-shaped substrate (11); a light emitting element (13) and a light receiving element (14) mounted on the substrate (11); light transmitting resin layer (12) which seals the light emitting element (13) and the light receiving element (14); and a light shielding portion (21) provided between the light emitting element (13) and the light receiving element (14). The light shielding portion (21) is formed at a height such that a part of light beam can be directly transferred between the light emitting element (13) and the light receiving element (14) via the light transmitting resin layer (12).

Claims

1. An opto-reflector comprising:

a plate-shaped substrate;

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

a light transmitting resin layer sealing the light emitting element and the light receiving element; and

a light shielding portion located between the light emitting element and the light receiving element,

wherein the light shielding portion is formed at a height such that a part of light beam can be directly transferred between the light emitting element and the light receiving element via the light transmitting resin layer, and

wherein when an incident angle exceeds a predetermined critical angle, a first part of the light is directly incident on the light receiving element, and a second part of the light is reflected in the beam transmitting resin layer due to total reflection and incident on the light receiving element.

2. The opto-reflector according to claim 1,

wherein an air layer is located between the light transmitting resin layer to seal the light emitting element and the light transmitting resin layer to seal the light receiving element, and a part of the light beam can be directly transferred between the light emitting element and the light receiving element via the light transmitting resin layer and the air layer.

3. The opto-reflector according to claim 1,

wherein the substrate includes a plurality of recessed portions, each of the light emitting element and the light receiving element is disposed so as to be accommodated in one of the plurality of recessed portions, and the light shielding portion is formed by a side wall portion of the recessed portion between the light emitting element and the light receiving element.

4. The opto-reflector according to claim 3,

wherein a reflective film is provided on at least the side wall portion of the recessed portion in which the light emitting element or the light receiving element is disposed.

5. The opto-reflector according to claim 1,

wherein a part of an upper end of the light emitting element and a part of an upper end of the light receiving element are positioned above an upper end of the light shielding portion.