The following operators can be used to better focus your queries.
( ) , AND, OR, NOT, W/#
? single char wildcard, not at start
* multi char wildcard, not at start
(Cat? OR feline) AND NOT dog?
Cat? W/5 behavior
(Cat? OR feline) AND traits
Cat AND charact*
This guide provides a more detailed description of the syntax that is supported along with examples.
This search box also supports the look-up of an IP.com Digital Signature (also referred to as Fingerprint); enter the 72-, 48-, or 32-character code to retrieve details of the associated file or submission.
Concept Search - What can I type?
For a concept search, you can enter phrases, sentences, or full paragraphs in English. For example, copy and paste the abstract of a patent application or paragraphs from an article.
Concept search eliminates the need for complex Boolean syntax to inform retrieval. Our Semantic Gist engine uses advanced cognitive semantic analysis to extract the meaning of data. This reduces the chances of missing valuable information, that may result from traditional keyword searching.
This article relates to a liquid metal dispenser which dispenses clean, oxide-free metal to a crucible for evaporation. The resulting evaporated films are stoichiometric in character.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
83% of the total text.
Page 1 of 2
Liquid Metal Dispenser
This article relates to a liquid metal dispenser which dispenses clean, oxide-
free metal to a crucible for evaporation. The resulting evaporated films are
stoichiometric in character.
Fig. 1 shows the details of the system. A susceptor 1 made of carbon or
other compatible material has a cavity in which a melt 2 of metal or alloy metal is
placed. Melt 2 is kept in the molten state by a heating element 3 (resistive or
inductive) which surrounds susceptor 1. At the base of the cavity, a metering
valve 4 dispenses specific amounts of molten metal or alloy into trunk 5, which is
movably disposed over an evaporating boat or crucible 6 when a new charge 7 is
desired. Trunk 5 is heated by element 8 to prevent melt 2 from freezing in trunk
5 on its way to boat 6. At the end of the charging cycle, trunk 5 is moved out of
the evaporation stream, thus keeping it free of unnecessary deposits. This
process can be repeated indefinitely, even to the point of recharging susceptor 1
in situ with additional solid material, if desired.
This dispenser has a number of advantages: (a) all oxides or dross are
floated to the top of melt 2 dispensing only pure metal or alloy; b) susceptor 1
can be charged with metal in pellet, powder or wire form; (c) melt 2 in the molten
state in a vacuum system, is degassed and heated, reducing preheat and soak
cycles; (d) since trunk 5 is heated and is movable, dispensing of low melting
point metals does not present a problem du...