Method for preparing high-voltage SIDAC
A bidirectional trigger and diode technology, which is applied in semiconductor/solid-state device manufacturing, electrical components, circuits, etc., can solve the problems of low reliability of diodes, high requirements for manufacturing conditions, and high production costs, so as to enhance anti-ablation ability and reduce Production cost, the effect of improving product quality
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[0044] Example: Making a high-voltage bidirectional trigger diode
[0045] (1) Prepare raw materials:
[0046] ①Preparation of silicon wafers: Cut the purchased N-type single crystal rods into circular shapes as raw silicon wafers, with a resistivity of ρ=4±1Ω.cm and a thickness of 200±10μm;
[0047] ② Prepare the etching solution used in the chemical polishing step: mix evenly according to the volume ratio of hydrofluoric acid, glacial acetic acid and nitric acid 1:1:2:27;
[0048]3. prepare the rinsing solution used in the nickel plating and alloying steps: mix evenly in the proportion of hydrofluoric acid: deionized water=1:15;
[0049] ④ Prepare the nickel plating solution A used in the nickel plating and alloying steps: nickel chloride: ammonium chloride: diammonium hydrogen citrate: sodium hypophosphite: deionized water = 30g: 50g: 65g: 10g: 1000ml than mixing evenly;
[0050] ⑤ Prepare the mixed acid solution used in the pickling step: mix evenly according to the vol...
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