Seed crystals, seed crystal holders, and a method for pulling a single crystal
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 31, 2000
Issued Date -
N/A
app pub date -
Oct 29, 1999
filing date -
Sep 15, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
When a pulled single crystal becomes heavier, the strength of a seed crystal holder made of a carbon material is not sufficient, leading to falling of the single crystal. On the other hand, a seed crystal holder made of metal causes heavy metal contamination, or the strength thereof deteriorates early because of thermal fatigue. Accordingly, a seed crystal holder, comprising an inner cylindrical body made of metal which directly holds a seed crystal, and a carbon cylindrical body arranged around the inner cylindrical body which covers the periphery thereof, is used.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully