We are a semiconductor device manufacturer. We need square shaped Thyristor chips with corner gate, both sides of the chips shall be solderable. Detailed specifications are as under: 1) 25 Amp/1400 Volts, (size:5.85mmx5.85mm). 2) 40 Amp/1400 Volts, (size:6.2mmx6.2mm) 3) 55 Amp/1400 Volts, (size:9.3mmx9.3mm) 4) 100 Amp/1400 Volts, (size:12.2mmx12.2mm) Quantity needed is 5000 pcs each.