Efficient energy-saving Schottky diode

Abstract

The invention provides a Schottky diode. By adopting an electrode layer protection ring technique of a Schottky diode chip, a reverse insulating ability is improved. A reverse leakage current of the Schottky diode is less than or equal to 15 muA and a reverse voltage-during ability is more than or equal to 50 V. The manufacturing process and flow are simplified, the raw materials and energy sources are saved, the manufacturing efficiency is improved and the manufacturing cost is lowered. Corrosion chemicals which will pollute environment are forbidden to use so the environment is protected. A ladder-shaped conical cylinder design of a lead head of the Schottky diode can increase a welding area, as well as decrease a contact area of the Schottky diode chip, reduce the short circuit phenomenon caused by welding and improve the weldability. The Schottky diode chip and the lead head can be effectively and reliably welded, so the extending and bending resistant properties of the Schottky diode are enhanced, the service life thereof is prolonged and the superior product rate is increased.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to a Schottky diode designed by using an electrode layer protection ring and a lead head trapezoidal cone cylinder. Background technique [0002] Traditional high-power diodes are currently widely used as Schottky diodes. Schottky diodes were invented by German scientist Schottky (Schottky) in 1938. It is a high-power, low-power, ultra-high-speed semiconductor device. , the most notable feature is that the reverse recovery time is extremely short, and the forward voltage drop is only about 0.4V. It is widely used in high frequency, low voltage, high current rectification, freewheeling, protection, and microwave communication, but it has reverse Large leakage current ≥ 200μA, more power loss, low reverse withstand voltage (about 40V), complicated production process, flat contact of lead head, poor welding effect, low yield, limited service life and not dura...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects and deficiencies of the above existing Schottky diodes, such as large reverse leakage, large power loss, low reverse withstand voltage, complicated process, low yield, limited service life and impermanence, the present invention provides a high-efficiency The energy-saving Schottky diode adopts a self-developed Schottky diode chip pole protection ring technology, which improves the reverse insulation capability. Therefore, a Schottky diode of the present invention can inherit and develop the existing Schottky The advantage of the diode overcomes its defects and deficiencies at the same time, so that the reverse leakage current of a Schottky diode of the present invention is ≤15μA, and the reverse withstand voltage capability is enhanced to ≥50V, which simplifies the production process and process, saves raw materials and energy, and improves Improve production efficiency and reduce costs; especially save the process of using corrosive and polluting environmental chemicals, eliminate the use of corrosive and polluting environmental chemicals, and make our common environment more friendly; and a Schottky diode lead head The design of the trapezoidal cone and cylinder makes the lead head of the approximate trapezoidal peak increase the welding surface while reducing the contact surface with a Schottky diode chip, which reduces the phenomenon of short circuit during welding, improves solderability, and ensures The effective and reliable welding of a Schottky diode chip and the lead head is improved, the ability of a Schottky diode to resist stretching and bending is enhanced, and the purpose of prolonging the service life of a Schottky diode is realized. Schottky diode ex-factory quality rate

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