Vacuum air-tight sealed SMD-UV-LED (surface mounted ultraviolet light-emitting diode)

Abstract

The invention discloses a vacuum air-tight sealed SMD-UV-LED (surface mounted ultraviolet light-emitting diode). The vacuum air-tight sealed SMD-UV-LED comprises a substrate, four metal frameworks symmetrically with each other are mounted on the periphery of a top edge of the substrate, first sealed layers are arranged between bottom portions of the metal frameworks and top portions of edges of the substrate, top ends of the metal frameworks are connected with peripheric bottom edges of optical glass window, second sealed layers are arranged between top portions of the metal frameworks and bottom portions of peripheric edges of the optical glass window, the first sealed layer and the second sealed layer are in sealed packages, a relatively sealed cavity is formed among the substrate, the metal frameworks and the optical glass window, and massive production can be realized by the aid of the production design. The vacuum air-tight sealed SMD-UV-LED being a standard element which is low in cost, miniaturized and surface-mounted solves the problem that a non-air-tight sealed ultraviolet LED deteriorates quickly in light output performance after working hundreds of hours due to the facta sealing level cannot meet the requirement, is capable of meeting an extremely high requirement on radiation of a high-power chip by the aid of a semiconductor cooling structure comprising a thermoelectric cooler TEC, and is suitable for popularization.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic packaging, and belongs to the field of surface mount (SMD) hermetic packaging of ultraviolet light-emitting diodes (UV-LED) with high light efficiency, high reliability and high thermal conductivity for special applications, and specifically relates to a vacuum airtight package SMD-UV-LEDs. Background technique [0002] Ultraviolet light-emitting diodes are divided into UVC deep ultraviolet (190nm~280nm), near ultraviolet UVB (280~380nm) and ultraviolet UVA (380~420nm) in terms of wavelength, each has its own characteristics and application fields, such as UVA, UVB in anti-counterfeiting , Light curing, UVC is widely used in the field of disinfection. [0003] The traditional ultraviolet generator is usually a fluorescent tube, which generates ultraviolet light under the action of cathode rays through the substance coated in the sealed glass tube, which has the advantages of simple process...

AI Technical Summary

Problems solved by technology

However, the inner filling material usually contains heavy metal substances such as mercury (Hg), and it has been clearly banned from use in a few years

Moreover, the fluorescent efficiency is low, and it is difficult to miniaturize. Therefore, in recent years, a brand-new ultraviolet light-emitting diode chip has been developed and packaged into a small sticker component, which gradually appears on the market.

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