Method for manufacturing a triple wavelengths white led

• US 20030228412A1
• Filed: 09/09/2002
• Published: 12/11/2003
• Est. Priority Date: 06/07/2002
• Status: Abandoned Application

• Current Assignee: Solidlite Corp.
• Original Assignee: Solidlite Corp.
• Inventors: Chen, Hsing
• Application Number:
  US10/238,169
• Publication Number:
  US 20030228412A1
• Time in Patent Office: Days
• US Class Current: 427/157
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials

Abstract

A method for manufacturing a triple wavelengths white LED chooses a blue LED chip whose wavelength is ranged between 430 nm and 480 nm. A red and green mixed phosphor is coated on the blue LED chip. Thus, the red and green mixed phosphor may be excited by the blue LED chip, thereby producing a triple wavelengths white LED.

Claims

1. A method for manufacturing a triple wavelengths white LED, comprising:

providing a blue LED chip (the wavelength is ranged between 430 nm and 480 nm), and a red and green mixed phosphor that may be excited by the blue LED chip, wherein;

the red and green mixed phosphor absorbs a part of blue rays emitted from the blue LED chip, to excite red rays and green rays having wavelengths different from that of the absorbed blue rays, the excited red rays and green rays are then mixed with the blue rays emitted from the blue LED chip, thereby producing a triple wavelengths white LED;

the red and green mixed phosphor includes a red phosphor that at least contains;

Li₂TiO₃;

Mn;

or

LiAlO₂;

Mn;

or

6MgO.As₂O₅;

Mn⁴⁺;

or

3.5MgO.0.5MgF₂.GeO₂;

Mn⁴⁺; and

the red and green mixed phosphor includes a green phosphor that at least contains;

Y₃(Ga_xAl<sub>1−

x</sub>)₅O₁₂;

Ce(0<

x<

1);

or

La₂O₃.11Al₂O₃;

Mn;

or

Ca₈Mg(SiO₄)₄Cl₂;

Eu, Mn.

2. The method for manufacturing a triple wavelengths white LED in accordance with claim 1, wherein the red phosphor of the red and green mixed phosphor is Li₂TiO₃:

Mn when a light emitting peak wavelength is about 659 nm, is LiAlO₂;

Mn when a light emitting peak wavelength is about 670 nm, is 6MgO.As₂O₅;

Mn⁴⁺ when a light emitting peak wavelength is about 650 nm, or is 3.5MgO.0.5MgF₂.GeO₂;

Mn⁴⁺ when a light emitting peak wavelength is about 650 nm.

3. The method for manufacturing a triple wavelengths white LED in accordance with claim 1, wherein the green phosphor of the red and green mixed phosphor is La₂O₃.11Al₂O₃:

Mn when a light emitting peak wavelength is about 520 nm, is Y₃(Ga_xAl<sub>1−

x</sub>)₅O₁₂;

Ce(0<

x<

1) when a light emitting peak wavelength is about 516 nm, or is Ca₈Mg(SiO₄)₄Cl₂;

Eu, Mn when a light emitting peak wavelength is about 515 nm.

4. The method for manufacturing a triple wavelengths white LED in accordance with claim 1, wherein the green phosphor and the red phosphor may be mixed according to various proportions, thereby forming an LED with a middle color, such as a pink color or a bluish white color.

5. The method for manufacturing a triple wavelengths white LED in accordance with claim 1, wherein the blue LED chip has an InGaN type, a SiC type or a ZnSe type.

6. The method for manufacturing a triple wavelengths white LED in accordance with claim 1, wherein the method includes a package structure that has a white light lamp type LED or a white light SMD type LED.