Optical coupling device

Patent metadata

Field	Value
Publication number	US-11609373-B2
Application number	US-202017015350-A
Country	US
Kind code	B2
Filing date	Sep 9, 2020
Priority date	Feb 10, 2020
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

An optical coupling device includes a light receiving element including a first output terminal and a second output terminal, a light emitting element provided on the light receiving element, a first switching element, a first electrode plate, and a sealing member. The first switching element includes a first main terminal connected to the first output terminal, a first control terminal connected to the second output terminal, and a second main terminal. An upper surface of the first electrode plate is connected to the second main terminal. The sealing member covers the light receiving element, the light emitting element, and the first switching element. A lower surface of the first electrode plate is exposed on a lower surface of the sealing member. The lower surface of the first electrode plate and the lower surface of the sealing member form the same plane.

First claim

What is claimed is:

1. An optical coupling device, comprising:
a light receiving element including a first output terminal and a second output terminal;
a light emitting element provided on the light receiving element;
a first switching element including a first main terminal connected to the first output terminal, a first control terminal connected to the second output terminal, and a second main terminal;
a first electrode plate, an upper surface of the first electrode plate being connected to the second main terminal; and
a sealing member covering the light receiving element, the light emitting element, and the first switching element, a lower surface of the first electrode plate being exposed on a lower surface of the sealing member,
the lower surface of the first electrode plate and the lower surface of the sealing member forming a same plane.

2. The device according to claim 1 , wherein
a thickness of the first electrode plate is not more than 0.1 mm.

3. The device according to claim 1 , further comprising:
a first metal plate, a lower surface of the first metal plate being exposed on the lower surface of the sealing member,
the first switching element being provided on the first metal plate, and
the first main terminal, the first control terminal, and the second main terminal being provided on an upper surface of the first switching element.

4. The device according to claim 1 , further comprising:
a first insulating film, a lower surface of the first insulating film being exposed on the lower surface of the sealing member,
the first switching element being provided on the first insulating film, and
the first main terminal, the first control terminal, and the second main terminal being provided on an upper surface of the first switching element.

5. The device according to claim 1 , further comprising:
a second metal plate, an upper surface of the second metal plate being bonded to a lower surface of the light receiving element, a lower surface of the second metal plate being exposed on the lower surface of the sealing member,
the lower surface of the first electrode plate, the lower surface of the second metal plate, and the lower surface of the sealing member forming a same plane.

6. The device according to claim 1 , further comprising:
a second insulating film, an upper surface of the second insulating film being bonded to a lower surface of the light receiving element, a lower surface of the second insulating film being exposed on the lower surface of the sealing member,
the lower surface of the first electrode plate, the lower surface of the second insulating film, and the lower surface of the sealing member forming a same plane.

7. The device according to claim 1 , further comprising:
a second switching element provided side by side with the first switching element, the second switching element including a third main terminal, a second control terminal and a fourth main terminal, the third main terminal and the second control terminal being provided on an upper surface of the second switching element, the fourth main terminal being provided on a lower surface of the second switching element, the third main terminal being connected to the first output terminal of the light receiving element, the second control terminal being connected to the second output terminal of the light receiving element; and
a second electrode plate, an upper surface of the second electrode plate being connected to the fourth main terminal of the second switching element, a lower surface of the second electrode plate being exposed on the lower surface of the sealing member,
the first main terminal and the first control terminal of the first switching element being provided on an upper surface of the first switching element, the second main terminal of the first switching element being provided on a lower surface of the first switching element, and
the light receiving element being disposed above the first switching element and the second switching element.

8. The device according to claim 1 , further comprising:
a third electrode plate connected to an anode terminal of the light emitting element, a lower surface of the third electrode plate being exposed on the lower surface of the sealing member; and
a fourth electrode plate connected to a cathode terminal of the light emitting element, a lower surface of the fourth electrode plate being exposed on the lower surface of the sealing member,
the lower surface of the third electrode plate, the lower surface of the fourth electrode plate, and the lower surface of the sealing member forming a same plane.

9. The device according to claim 1 , wherein
a metal member is not exposed on a side surface of the sealing member.

Assignees

• Toshiba Kk
• Toshiba Electronic Devices & Storage Corp

Inventors

• Fujihara Mami
• Takai Naoya
• Tanaka Kazuki

Classifications

• H10W90/00

  Package configurations · CPC title

• H10W72/30

  Die-attach connectors · CPC title

• H10W72/07351

  characterised by changes in properties of the die-attach connectors during connecting · CPC title

• H10W90/701

  characterised by the relative positions of pads or connectors relative to package parts · CPC title

• H10F77/413

  directly associated or integrated with the devices, e.g. back reflectors (directly associated or integrated with photovoltaic cells H10F77/42) · CPC title