Correction of fabricated shapes in additive manufacturing using sacrificial material
US10882160B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2018 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Dec 8, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y50/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of fabricating a polishing pad using an additive manufacturing system includes depositing a first set of successive layers onto a support by droplet ejection. Depositing the first set of successive layers includes dispensing a polishing pad precursor to first regions corresponding to partitions of the polishing pad and dispensing a sacrificial material to second regions corresponding to grooves of the polishing pad. A second set of successive layers is deposited by droplet ejection over the first set of successive layers. The second set of successive layers corresponds to a lower portion of the polishing pad. The first set of successive layer and the second set of successive layers provide a body. The body is removed from the support. Removing the sacrificial material from the body provides the polishing pad with a polishing surface that has the partitions separated by the grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.