# US 4,393,576 A · Method of producing electrical contacts on a silicon solar cell

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- Number: US 4,393,576 A
- Document ID: US4393576A
- Status: Granted
- Kind: A
- Application number: 06/298,927
- Filed: 1981-09-02
- Granted: 1983-07-19
- Earliest claimed: 1980-09-26
- Assignees: Licenta Patent-Verwaltungs-GmbH
- Inventors: Reinhard Dahlberg
- Web page: https://patentgrep.com/patent/US4393576A

## CPC

- H10W 99/00: Subject matter not provided for in other groups of this subclass
- H10F 77/211: {for photovoltaic cells}
- H10P 14/40: of conductive or resistive materials
- Y02E 10/50: Photovoltaic [PV] energy
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A method of producing electrical contacts on a Silicon Solar Cell comprises stamping contact shapes from a carrier with a metallic film or foil adhered thereto and applying the stamped out film or foil to the silicon surface to adhere thereto while removing the carrier therefrom.

## Claims

### Claim 1

A method of producing electrical contacts on a silicon solar cell, comprising: stamping out a metal film or foil adhering to one side of a carrier together with the carrier in the shape of the contacts; and applying the stamped contact film or foil to the silicon so as to be detached from the carrier and to adhere to the silicon surface.

### Claim 2 (depends on 1)

A method as defined in claim 1, wherein said step of applying comprises alloying or sintering said film or foil located on said silicon surface onto said silicon in a reducing atmosphere.

### Claim 3 (depends on 2)

A method as defined in claim 2, wherein said step of applying further comprises pressing the film or foil on said silicon surface against said silicon surface during said sintering or alloying process under mechanical pressure.

### Claim 4 (depends on 1)

A method as defined in claim 1, wherein films or foils selected from the groups consisting of aluminium, aluminium/silicon alloys, iron/silicon alloys, tin, lead, copper and antimony, arsenic, zinc or alloys of these metals with each other are used as contact material.

### Claim 5 (depends on 1)

A method as defined in claim 1, wherein said step of applying comprises sintering or fusing said film or foil on said silicon by brief heating with the aid of a focussed light or laser beam.

### Claim 6 (depends on 1)

A method as defined in claim 1, wherein the stamped film or foil is retained, transported or processed together with its associated stamped carrier adhering to a conveyor belt.

### Claim 7 (depends on 6)

A method as defined in claim 6, wherein an organic plastic is used as a material for said carriers and said conveyor belt.