Method of manufacturing light emitting device

• US 20050070039A1
• Filed: 10/01/2003
• Published: 03/31/2005
• Est. Priority Date: 10/09/2002
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yamazaki, Shunpei, Murakami, Masakazu
• Granted Patent: US 6,919,215 B2
• Time in Patent Office: Days
• US Class Current: 438/33
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2330/028 Generation of voltages supplied to electrode drivers in a matrix display other than LCD
• CPC Class Codes: G09G 3/006 Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/70 Testing, e.g. accelerated lifetime tests
• CPC Class Codes: H10K 71/851 Division of substrate

Abstract

The present invention provides a manufacturing method of a light emitting device in which the number of display panels manufactured from one substrate is increased and display panel is mass produced is provided. One feature of the invention is that the shipping is performed not by separating the substrate over which a plurality of light emitting regions is formed and attaching the FPC to the each piece thereof but before separating, namely in the incomplete state (that can be also referred to as semi end products). However, the invention has a structure in which the inspection can be partly carried out before the shipping.

Claims

1. A method for manufacturing a light emitting device by comprising the steps of:

forming a plurality of light emitting regions and terminal portions over a first substrate in a first place;

sealing a light emitting element with a second substrate in the first place;

removing one part of the second substrate overlapped with one part of a plurality of terminal portions by separating, and exposing the one part of the terminal portions in the first place;

inspecting by applying a current only to the one part of the terminal portions in the first place;

transporting from the first place to a second place,

cutting off the first and the second substrates and dividing into each light emitting region in the second place; and

attaching an FPC to a terminal portion connected to one light emitting region in the second place.

2. A method according to claim 1, wherein n x m (n >

1 and m >

1) light emitting regions are arranged in n lines and m columns in the first substrate.

4. A method according to claim 1, wherein a plurality of light emitting elements and a plurality of TFTs are provided for the light emitting region.

5. A method according to claim 1, wherein the second substrate has the same size as that of the first substrate or smaller size than that of the first substrate.

6. A method according to claim 1, wherein the light emitting device is one of a video camera, digital camera, a display, a car navigation, a personal computer, and a personal digital assistant.

3. A method for manufacturing a light emitting device comprising the steps of:

forming a plurality of light emitting regions and terminal portions over a first substrate in a first place;

sealing a light emitting element with a second substrate in the first place;

dividing the first substrate in the first place;

removing one part of the second substrate overlapped with one part of a plurality of terminal portions by separating, and exposing the one part of the terminal portions in the first place;

inspecting by applying a current only to the one part of the terminal portions in the first place;

transporting from the first place to a second place,

cutting off the first and the second substrates and dividing into each light emitting region in the second place; and

attaching an FPC to a terminal portion connected to one light emitting region.

7. A method according to claim 3, wherein the plurality of light emitting elements and a plurality of TFTs are provided for the light emitting region.

8. The method according to claim 3, wherein the second substrate has the same size as that of the first substrate or smaller size than that of the first substrate.

9. A method according to claim 3, wherein the light emitting device is one of a video camera, digital camera, a display, a car navigation, a personal computer, and a personal digital assistant.