The preent invention relates to a method for enclosing unenclosed integrated circuit in circuit board, including the following steps: firstly an unenclosed intgrated circuit and a circuit board whose size is suitable to be processed by lead bonding device are provided, and then the unenclosed integrated circuit is bonded to the circuit board whose size is suitable to be processed by lead bonding device by attaching leads; second, the described lead bonding operation of said circuit board is completed, and then the surface of said unenclosed integrated circuit is coated with a colloidl protective layer, and finally the above-mentioned circuit board whose leads are bonded is welded to a main circuit board whose area is larger. |