| 摘要 |
PURPOSE:To prevent the fluctuation of substrate potential and accurately judge whether a semiconductor chip is good or bad by forming an insulating layer in about the same size as that of a pad for drawing an electrode in the separating region of the semiconductor chip. CONSTITUTION:A separating region 7 of a semiconductor chip 6 divided by field oxide films 2, 3 is provided with an N type semiconductor layer 8, on which an insulating layer 10 in about the same size as that of a pad for drawing out an electrode on the chip 6 and furthermore a metal layer 5 made of aluminum. In addition, an element region 11 divided by field oxide films 3, 4 is supplied with an MOS element consisting of a gate oxide film 12, a gate electrode 13, a source 14 and a drain 15, which is followed by forming an insulating film 16 and electrodes 17, 18 and laminating a protective film 21. Use of this semiconductor device 20 makes it possible to judge whether the semiconductor chip 6 is good or bad by making the tip of a sensor contact the metal layer 5 on the insulating layer 10, while the fluctuation of substrate potential caused by the noise of the sensor can be prevented. |
