US4613306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporator crucible for vacuum depositing systems
Assignee: Balzers und Leybold Deutschland Holding AG
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Filing: 1985-05-02
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Granted: 1986-09-23
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Expires: 2005-05-02
Abstract
Abstract Evaporator crucible for vacuum depositing systems, having a crucible bottom with at least one bottom opening for the introduction of material in rod form for evaporation. At a distance from the bottom opening there is provided at least one metal crucible rim which preferably is provided with a coolant passage. To solve the problem of reducing the heat losses, the crucible rim is provided internally on at least a part of its depth with a lagging comprising ceramic material. This lagging preferably comprises individual ceramic building blocks which are preferably compressed from magnesium oxide.
Inventors
- 👤 Volker Bauer
- 👤 Albert Feuerstein
- 👤 Horst Ranke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243; C23C14/246; C23C14/28; C23C14/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
An electron-beam evaporator crucible for vacuum depositing systems, comprising: a crucible bottom with a wall surface forming a plurality of bottom openings for the introduction of evaporation material in rod form, and a metal crucible rim having a wall surface disposed at a distance from the bottom openings, and a coolant passage in said crucible rim; and a lagging comprising ceramic material provided internally on at least a portion of the depth of said crucible rim.
Claim 2
Dependent Claim
76 words
An electron-beam evaporator crucible for vacuum depositing systems, comprising: a crucible bottom with a wall surface forming a plurality of bottom openings for the introduction of evaporation material in rod form, and a metal crucible rim having a wall surface disposed at a distance from the bottom openings, and a coolant passage in said crucible rim; and a lagging comprising ceramic material provided internally on at least a portion of the depth of said crucible rim.
Claim 3
Dependent Claim
18 words
An evaporator crucible in accordance with claim 1, in which said ceramic lagging comprises individual ceramic building blocks.
Claim 4
Dependent Claim
30 words
An evaporator crucible in accordance with claim 2, in which said ceramic lagging comprises at least two rows of ceramic bulding blocks having joints which are offset from one another.
Claim 5
Dependent Claim
26 words
An evaporator crucible in accordance with claim 3, in which said metal crucible rim has a peripheral projection overlapping said ceramic building blocks at least partially.
Claim 6
Dependent Claim
17 words
An evaporator crucible in accordance with claim 1, in which said ceramic material comprises compressed magnesium oxide.
Claim 7
Dependent Claim
24 words
An evaporator crucible in accordance with claim 2, which includes strips of metal disposed between said ceramic building blocks and said metal crucible rim.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-22 | 1990-03-24 | 1990-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-22 | 1994-03-24 | 1994-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-22 | 1998-03-24 | 1998-09-23 | $7700.00 | Window Closed / Lapsed |