Sapphire substrate configured to form light emitting diode chip providing light in multi-directions, light emitting diode chip, and illumination device

• Main Authors: HUANG, CHIH-SHU, HONG, SIANG-FU, TANG, SHIHIEH, LEE, CHEN-HONG, YANG, CHENG-KUANG, CHENG, WEI-KANG, PAN, SHYI-MING, WANG, TZU-HSIANG, YEH, SHIH-YU, PU, CHIIH
• Format: Patent
• Language: English; French; German
• Published: 04.12.2013
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATINGELEMENTS; LIGHTING; MECHANICAL ENGINEERING; NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; SEMICONDUCTOR DEVICES; WEAPONS

A sapphire substrate (2) configured to form a light emitting diode (LED) chip (3) providing light in multi-directions, a LED chip and an illumination device are provided in the present invention. The sapphire substrate includes a growth surface (21A) and a second main surface (21B) opposite to each other. A thickness of the sapphire substrate is thicker than or equal to 200 micrometers. The LED chip includes the sapphire substrate and at least one LED structure. The LED structure is disposed on the growth surface and forms a first main surface where light emitted from with a part of the growth surface without the LED structures. At least a part of light beams emitted from the LED structure pass through the sapphire substrate and emerge from the second main surface. The illumination device includes at least one LED chip and a supporting base (5). The LED chip is disposed on the supporting base.