In a memory module having a designated group of memory cells assigned to represent a logical portion of the memory structure, a memory redundancy circuit having a redundant group of memory cells; and a redundancy controller coupled with the designated group and the redundant group. A second parting film is held on a second flat laminating table in close contact with the second flat laminating table by suction, and then narrow prepregs to form a gridlike prepreg-laminate. Methods of using the foregoing to induce the death of tumor cells are disclosed. The output transistor provides a ramp shaped output current under control of a ramp generator.