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AssigneeCanon Kabushiki Kaisha
InventorsMasaki Tokioka, Hiroharu Ueda, Mitsutoshi Hasegawa, Tokutaka Miura
Estimating the term…
A joining material like an In film having a low melting point forms a surface oxide film when melted. If the oxide film is thick, an uneven surface shape will remain as it is, and can cause vacuum leakage during vacuum sealing. This problem is solved, for example, by placing particles of a refractory material inside the low melting joining material. The particles of the refractory material serve as a holding member for the low melting material and break the oxide film during a joining operation to bring the seal bonding with the low melting material to perfection.
An image display apparatus comprising an envelope having a first substrate, and a second substrate opposed with a gap to said first substrate, and an image display member placed in said envelope, wherein in a peripheral region of said first substrate or said second substrate, said first substrate and said second substrate are seal-bonded with a joining member of a metal having a member of a high melting point material which has a melting point higher than that of the joining member, and which is enveloped in the joining member,
An image display apparatus comprising an envelope having a first substrate, and a second substrate opposed with a gap to said first substrate, and an image display member placed in said envelope, wherein in a peripheral region of said first substrate or said second substrate, said first substrate and said second substrate are seal-bonded with a joining member of a metal having a member of a high melting point material which has a melting point higher than that of the joining member, and which is enveloped in the joining member,
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Sealing together parts of vessels: the vessel being for a flat panel display
Electrodes; Screens; Mounting, supporting, spacing or insulating thereof: mounting or supporting arrangements for flat panel cathode ray tubes,…
Electric discharge tubes or discharge lamps
Term ended 30 Nov 2022 (estimated)
1. Field of the Invention
The present invention relates to image display apparatus using an electron source substrate with electron-emitting devices therein and, more particularly, to structure in a vacuum seal bonding portion.
2. Related Background Art
FIG. 1 is an illustration showing a schematic sectional structure of the peripheral region of the display panel (envelope) according to Example 1 of the present invention;
FIG. 2 is a plan view showing a basic configuration of an electron source substrate, which is a constitutive member of the image display apparatus of the present invention;
FIG. 3 is an illustration for explaining a production step of the electron source substrate of FIG. 2;
Configurations according to the present invention are as follows.
Specifically, a first aspect of the present invention is an image display apparatus comprising an envelope having a first substrate, and a second substrate opposed with a gap to the first substrate; and image display means placed in the envelope, wherein in a peripheral region of the first substrate or the second substrate, the first substrate and the second substrate are seal-bonded with a joining member of a low melting metal having a member of a refractory material inside thereof.
According to the first aspect of the present invention as described, the joining member has the member of the refractory material having the melting point higher than that of the joining member, inside thereof, whereby during the seal bonding operation, the member of the refractory material can break the surface oxide film of the joining member so as to exclude the oxide film successfully from the joint surface. Therefore, adhesion (bond strength) is high between the joint surfaces of the substrates and the joining member and the envelope is obtained with excellent seal performance. Furthermore, the member of the refractory material ensures excellent holding performance for the gap between the two substrates.