Silica crucible for pulling silicon single crystal and method of producing the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 6, 2015
Grant Date -
Jan 20, 2011
app pub date -
Mar 2, 2009
filing date -
Feb 29, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is provided a silica crucible for pulling a silicon single crystal, comprising silica glass and having a two-layer structure of an outer layer and an inner layer, wherein the inner layer, in a sectional side view of the crucible, has a wavy inner surface shape having mountain parts and valley parts at least between a start position and an end position for the pulling of a silicon single crystal in a silicon melt surface, and when a distance from an upper opening end of the crucible to the start position for the pulling of the silicon single crystal is 100, only a crucible portion from the upper opening end to a position within a range of 40 to 100 is crystalline.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
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