Method of manufacturing an electroluminescence display device

• US 4,888,077 A
• Filed: 08/24/1987
• Issued: 12/19/1989
• Est. Priority Date: 08/26/1986
• Status: Expired due to Term

• Current Assignee: Goldstar Jewellery LLC
• Original Assignee: Goldstar Jewellery LLC
• Inventors: Sohn, Sang H.
• Primary Examiner(s): Cashion, Jr., Merrell C.
• Application Number:
  US07/088,684
• Time in Patent Office: 848 Days
• Field of Search: 29/835, 29/836, 29/837, 29/841, 313/582, 313/583, 350/330, 361/401, 340/718, 340/719, 340/781, 315/169.3, 315/169.4, 156/275.5, 156/285, 156/330, 156/292, 156/293
• US Class Current: 156/285
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: Y10T 29/49137 Different components
• CPC Class Codes: Y10T 29/49139 by inserting component lead or terminal into base aperture
• CPC Class Codes: Y10T 29/49146 with encapsulating, e.g., potting, etc.

Abstract

A method of manufacturing an electroluminescence display device capable of displaying a predetermined number of characters comprising a bare chip, a groove for fittingly receiving the bare chip, and a vacuumized space for protecting the bare chip from external influences. Epoxy resin is applied to the lower periphery of the groove and the bare chip having approximately same size as the groove is received in and spaced from the bottom of the groove. By providing a panel lead at the same height as an Al electrode of the bare chip, ultrasonic bonding of an Al or Au wire to the panel lead and electrode is easily achieved.

Claims

1. In a method of manufacturing a display device including a display portion, a panel lead, a glass plate, and a bare chip, the improvement comprising:

forming a groove in said glass plate for receiving said bare chip therein;

forming said panel lead on said glass plate for electrical connection thereof to said display portion of said device;

securing said bare chip in said groove such that an electrode of said chip and said panel lead are substantially at the same height;

electrically connecting said electrode and said panel lead;

providing at least one spacer on said glass plate with a seal between said at least one spacer and said glass plate and extending about said bare chip, said at least one spacer permitting electrical connection of said electrode and said panel lead;

providing a plate on said at least one spacer spaced from said bare chip with a seal between said plate and said at least one spacer;

said glass plate, said at least one spacer and said plate defining an enclosure for said bare chip; and

vacuum sealing said enclosure to vacuum seal said bare chip therein.

2. The method of claim 1 wherein the step of securing said bare chip in said groove includes application of an epoxy resin to the periphery of said groove such that said bare chip is supported in said groove spaced from the bottom of said groove.

3. The method of claim 2 wherein the step of securing said bare chip in said groove spaced from the bottom thereof is accomplished without a protective layer therebetween.

4. The method of claim 1 wherein the step of sealing said bare chip includes forming an exhaust port in said plate communicating with said enclosure and forming a vacuum through said port.

5. The method of claim 4 wherein said port is sealed with a sealing material and the outer periphery, relative to said device, of said at least one spacer is coated with an epoxy resin.

6. In a method of manufacturing a display device including a display portion, a panel lead, a glass plate, and a bare chip, the improvement comprising:

forming a groove in said glass plate for receiving said bare chip therein;

forming said panel lead on said glass plate for electrical connection thereof to said display portion of said device;

securing said bare chip in said groove such that an electrode of said chip and said panel lead are substantially at the same height;

electrically connecting said electrode and said panel lead;

providing at least one spacer on said glass plate with a seal between said at least one spacer and said glass plate and extending about said bare chip and said display portion, said at least one spacer permitting electrical connection of said electrode and said panel lead;

providing a plate on said at least one spacer extending over and spaced from said bare chip and extending over said display portion with a seal between said plate and said at least one spacer;

said glass plate, said at least one spacer and said plate defining a first enclosure for said bare chip and a second enclosure in said display portion;

vacuum sealing said first enclosure to vacuum seal said bare chip therein; and

sealing said second enclosure in said display portion.

7. The method of claim 6 wherein the step of securing said bare chip in said groove includes application of an epoxy resin to the periphery of said groove such that said bare chip is supported in said groove spaced from the bottom of said groove.

8. The method of claim 7 wherein the step of securing said bare chip in said groove spaced from the bottom thereof is accomplished without a protective layer therebetween.

9. The method of claim 6 wherein the step of sealing said bare chip includes forming an exhaust port in said plate communicating with said first enclosure and forming a vacuum through said port.

10. The method of claim 9 wherein said port is sealed with a sealing material and the outer periphery, relative to said device, of said at least one spacer is coated with an epoxy resin.