# US 4,394,679 A · Light emitting device with a continuous layer of copper covering the entire header

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- Number: US 4,394,679 A
- Document ID: US4394679A
- Status: Granted
- Kind: A
- Application number: 06/187,160
- Filed: 1980-09-15
- Granted: 1983-07-19
- Earliest claimed: 1980-09-15
- Assignees: RCA Corporation
- Inventors: Frank Z. Hawrylo
- Web page: https://patentgrep.com/patent/US4394679A

## CPC

- H10H 20/8582: {characterised by their shape}
- H10H 20/8585: {being an interconnection}
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

The invention is an improved light emitting device comprising a light emitting element mounted on a header wherein the improvement comprises a thin layer of copper overlying the surface of the header including both the base and the stud. A large increase in the yield of useable devices is obtained for a light emitting element mounted on the header which emits between about 1.0 and about 1.7 micrometers.

## Claims

### Claim 1

In a light emitting device which comprises:
a base plate having two major surfaces;
a stud axially mounted on a first major surface;
a copper block mounted on the second major surface of the base plate; and
a light emitting element mounted on the copper block;
the improvement which comprises:
a continuous layer of copper between about 5 and about 125 micrometers thick covering the base, the copper block and the stud.

### Claim 2 (depends on 1)

A light emitting device according to claim 1 wherein the copper layer is between about 5 and about 50 micrometers thick.

### Claim 3 (depends on 1)

A light emitting device according to claim 1 wherein the light emitting element is composed of group III-V materials which emit light having a wavelength between about 1.0 micrometer and about 1.7 micrometers.

### Claim 4 (depends on 1)

A light emitting device according to claim 1 further comprising a cover having a window mounted therein mounted on the base plate which encloses the light emitting element;
wherein the window is so positioned in the cover that a light beam emitted by the element passes through the window.

### Claim 5

In a header which comprises:
a base plate having two major surfaces;
a stud axially mounted to a first major surface;
and a copper block mounted on the second major surface;
the improvement which comprises:
a continuous layer of copper between about 5 and about 125 micrometers thick covering the entire header.

### Claim 6 (depends on 1)

A header according to claim 1 wherein the copper layer is between about 5 and about 50 micrometers thick.