| 摘要 |
PURPOSE:To continuously and inexpensively obtain a lead frame coated with Al spot by coating Al on the entire surface of one side of an iron-nickel alloy or copper alloy tape as a composite tape, continuously punching the tape in the prescribed lead frame shape and then removing Al at the unnecessary part. CONSTITUTION:Al is coated on the overall surface in thickness of 1-10mum on one side surface of an Ni-Fe alloy tape in a continuous vacuum device. This Al-coated tape is continuously punched by a press in the prescribed lead frame shape, and the coated Al layer except the prescribed part is removed by a continuously partial etching device. The prescribed Al part on the lead frame which is fed from a supply 19 is masked with an elastic material 23, is dipped and passed through heated aqueous NaOH solution to remove the coated Al except the prescribed part, is then washed water, and is passed through a drying step, thereby continuously manufacturing an Al spot ion-nickel alloy lead frame. |
