# US 2014/0190465 A1 · System and method for dividing silicon blocks

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- Number: US 2014/0190465 A1
- Document ID: US20140190465A1
- Status: Published application
- Kind: A1
- Application number: 14/139,448
- Filed: 2013-12-23
- Published: 2014-07-10
- Earliest claimed: 2013-01-04
- Assignees: Deutsche Solar GmbH
- Applicants: Deutsche Solar GmbH
- Inventors: Bianca BÜRKNER; Nathan STODDARD; Tobias VOGEL
- Web page: https://patentgrep.com/patent/US20140190465A1

## CPC

- B28D 5/045: {by cutting with wires or closed-loop blades (B28D5/042 takes precedence)}
- B28D: WORKING STONE OR STONE-LIKE MATERIALS

## Abstract

The invention relates to a method for dividing silicon blocks, including the following steps: providing a cuboidal silicon block, dividing the silicon block into at least two bars in a first dividing step, turning the bars in a turning step by 90° respectively around a rotational axis perpendicular to the longitudinal direction of the block and dividing the bars into silicon ingots in a second dividing step.

## Claims

### Claim 1

System for dividing silicon blocks comprising:
a. a holding device for holding a silicon block to be divided,
b. a first briquetting machine with a wire web, and
c. a second briquetting machine with two partial wire webs, which respectively have several parallel cutting sections, wherein the cutting sections of the partial wire webs extend respectively perpendicular to each other.

### Claim 2

Method for dividing silicon blocks comprising the following steps:
a. providing a cuboidal silicon block,
b. in a first dividing step, dividing the silicon block into at least two bars,
c. turning the bars in a turning step by 90° respectively around a rotational axis extending perpendicular to the longitudinal direction of the block,
d. in a second dividing step, dividing the bars into silicon ingots.

### Claim 3 (depends on 2)

Method according to claim 2, wherein, in the first dividing step, the silicon block is divided along several cutting planes extending parallel to the longitudinal direction of the block.

### Claim 4 (depends on 3)

Method according to claim 3, wherein, a cutting plane passes along a middle plane of the silicon block.

### Claim 5 (depends on 2)

Method according to claim 2, wherein, in the first dividing step, two side slabs are separated from the silicon block.

### Claim 6 (depends on 2)

Method according to claim 2, wherein, the rotational axis extends respectively parallel to a <110> orientation of the bars.

### Claim 7 (depends on 2)

Method according to claim 2, wherein, in the second dividing step, slabs are separated from the bars.

### Claim 8 (depends on 2)

Method according to claim 2, wherein, in the second cutting step, the bars are divided along a cutting plane extending parallel to a longitudinal axis of the bars and along a cutting plane extending perpendicular to the longitudinal axis of the bars.

### Claim 9 (depends on 2)

Method according to claim 2, wherein, for the second dividing step, a briquetting machine with two wire webs is provided respectively having at least four parallel cutting sections.

### Claim 10 (depends on 2)

Method according to claim 2, wherein, exclusively vertical cutting planes are provided.

### Claim 11 (depends on 2)

Method for producing silicon ingots with longitudinal axes parallel to a <100> direction comprising the following steps:
a. producing a silicon block with a longitudinal direction of the block parallel to a <110> direction,
b. dividing the silicon block according to claim 2.