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AssigneeHitachi Metals, Ltd.
InventorShinji Furuichi
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A method for forming a composite vapor-deposited film which is suitable for the deposition on the fluorescent screen of a color television picture tube and the like and in which one side has a high light-reflectance and the other side has a property of absorbing heat rays, and a composite vapor-deposition material suitable for vacuum vapor deposition therefor are disclosed. This composite vapor-deposition material has an aluminum envelope and a low vapor-pressure metal/metalloid compound powder in the its core region. It is desirable that the low vapor-pressure metal/metalloid compound powder is dispersed and retained with aluminum in the core region. Vacuum vapor deposition carried out employing this composite vapor-deposition material yields a composition of almost 100% aluminum at the first stage of the vapor deposition, and subsequently forms a layer containing the low vapor-pressure metal/metalloid compound, from which the low vapor-pressure metal/metalloid compound is not diffused into the aluminum layer formed at the initial stage of the vapor deposition, even though heat treatment is applied. Therefore, a reflection layer having a high light-reflectance can be maintained.
A method for forming a composite vapor-deposited film having an initial vapor-deposited layer of aluminum, a final vapor-deposited layer containing aluminum and metal/metalloid compound having a vapor pressure lower than that of aluminum, and an intermediate portion having a gradient aluminum composition, comprising the steps of:
A composite vapor-deposition material for forming a composite vapor-deposited film having an initial vapor-deposited layer of aluminum, a final vapor-deposited layer containing aluminum and metal/metalloid compound having a vapor pressure lower than that of aluminum and an intermediate portion having a gradient aluminum composition, wherein the composite vapor-deposition material comprises an aluminum body and a core region in which powder of the metal/metalloid compound having a vapor pressure lower than that of aluminum is dispersed and retained with aluminum.
A method for manufacturing a composite vapor-deposition material for use in forming a composite vapor-deposited film having an initial vapor-deposited layer of aluminum, a final vapor-deposited layer containing aluminum and metal/metalloid compound having a vapor pressure lower than that of aluminum an d an intermediate portion having a gradient aluminum composition, comprising the steps of:
Dependencies are inferred from the claim text.