Touch screen substrate and method of manufacturing a touch screen substrate

• US 8,580,352 B2
• Filed: 10/21/2010
• Issued: 11/12/2013
• Est. Priority Date: 12/07/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Sung, Woo-Yong, Cha, Tae-Woon, Kim, Tae-Gyun
• Primary Examiner(s): LIGHTFOOT, ELENA TSOY
• Application Number:
  US12/909,514
• Publication Number:
  US 20110134060A1
• Time in Patent Office: 1,118 Days
• Field of Search: 427/508, 345/173
• US Class Current: 427/508
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A method of manufacturing a touch screen substrate includes forming a sensing electrode on a substrate, spraying a first ink and a second ink having a same amount of ink as the first ink to respectively form a first ink droplet and a second ink droplet on a light blocking region of the substrate, and irradiating a first light upon the first ink droplet to form a first spacer having a first height and a second light upon the second ink droplet to form a second spacer having a second height lower than the first height. A total energy of the first light irradiated upon the first ink droplet differs from a total energy of the second light irradiated upon the second ink droplet, and the second spacer makes contact with the sensing electrode.

Claims

1. A method of manufacturing a touch screen substrate, the method comprising:

forming a sensing electrode on a substrate;

spraying a first ink and a second ink having a same amount of ink as the first ink to respectively form a first ink droplet and a second ink droplet on a light blocking region of the substrate; and

irradiating a first light upon the first ink droplet to form a first spacer having a first height and a second light upon the second ink droplet to form a second spacer having a second height lower than the first height,

wherein total energy of the first light irradiated upon the first ink droplet differs from total energy of the second light irradiated upon the second ink droplet,

wherein said second spacer makes contact with said sensing electrode.

2. The method of claim 1, wherein the first ink is a photo-sensitive insulator, and the second ink is a photo-sensitive conductor.

3. The method of claim 1, wherein each of the first and second inks is a photo-sensitive insulator, and the sensing electrode is formed on the second spacer.

4. The method of claim 1, wherein

said first light has a first wavelength and is irradiated upon the first ink droplet during a first period;

and

said second light has a second wavelength and is irradiated upon the second ink droplet during a second period.

5. The method of claim 4, wherein the first wavelength is substantially the same as the second wavelength, and the second period is shorter than the first period.

6. The method of claim 4, wherein the first wavelength is shorter than the second wavelength, and the first period is substantially the same as the second period.

7. The method of claim 1, wherein the sensing electrode is formed in a light blocking region surrounding a light transmission region of the substrate, and wherein the method further comprises

forming a pixel electrode separated from the sensing electrode in the light transmission region, and forming a sensor line connected to the sensing electrode spaced apart from the first spacer in the light blocking region.

8. The method of claim 1, wherein the sensing electrode is formed in a light blocking region surrounding a light transmission region of the substrate, and wherein the method further comprises

forming a common electrode connected to the sensing electrode on the substrate, wherein the common electrode includes a hole exposing the second spacer.