Heat process apparatus and heat process method
US6129546A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1999 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Jun 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L21/6875
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Pins that are small protrusions are disposed on the upper surface of a heat process board. Through-holes are formed between the pins so as to deaerate from a space thereof. In a predetermined time period in the initial stage of the heat process, a deaerating process is performed using the through-holes. Thus, a negative pressure is applied to the space between the lower surface of the substrate and the upper surface of the heat process board so as to contact the substrate and the heat process board. Thereafter, the vacuum degree is lowered. Due to the rigidity of the substrate, the substrate and the heat process board are separated. In the initial stage of the heat process, since the substrate and the heat process board directly contact, the temperature of the substrate quickly and equally rises. In addition, when the heat shrinkage is large, since the substrate and the heat process board are separated, static electricity due to friction hardly takes place. Thus, a static breakdown can be prevented. Consequently, a heat process apparatus and a heat process method that allow the entire substrate to be heat-processed are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.