Replica hot pressing technique
US5250130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1991 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/4629
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A green body to be hot pressed by heating the body and applying pressure in a uniaxial direction to the body for an amount of time wherein the body has at least one non-uniform composition cross section relative to the uniaxial direction which cross section has regions which require differing amounts of shrinkage in the uniaxial direction to achieve maximum density under the pressure and heating for the amount of time, may be hot pressed according to a method including: PA0 a) laminating auxiliary material with the green body in the uniaxial direction wherein the auxiliary material includes at least one non-uniform composition cross section relative to the uniaxial direction which cross section has regions which require differing amounts of shrinkage in the uniaxial direction to achieve maximum density under the pressure and heating for the amount of time, whereby the net uniaxial shrinkage required by the laminate to achieve maximum density under the heating and pressure for the amount of time is substantially equal across the laminate; PA0 b) hot pressing the laminate to densify the body; and PA0 c) delaminating the auxiliary material from the densified body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.