Transistor, semiconductor device, and electronic device
摘要
說明書
An insulating material for forming the insulating layers, a conductive material for forming the electrodes, or a semiconductor material for forming the semiconductor layers can be formed by a sputtering method, a spin coating method, a chemical vapor deposition (CVD) method (including a thermal CVD method, a metal organic chemical vapor deposition (MOCVD) method, a plasma enhanced CVD (PECVD) method, a high density plasma CVD method, a low pressure CVD (LPCVD) method, an atmospheric pressure CVD (APCVD) method, and the like), an atomic layer deposition (ALD) method, a molecular beam epitaxy (MBE) method, a pulsed laser deposition (PLD) method, a dipping method, a spray coating method, a droplet discharge method (such as an inkjet method), or a printing method (such as screen printing or offset printing).
By using a PECVD method, a high-quality film can be formed at a relatively low temperature. By using a deposition method that does not use plasma for deposition, such as an MOCVD method, an ALD method, or a thermal CVD method, a film can be formed with few defects because damage is not easily caused on a surface on which the film is deposited. For example, a wiring, an electrode, an element (e.g., transistor or capacitor), or the like included in a semiconductor device might be charged up by receiving charges from plasma. In that case, accumulated charges might break the wiring, electrode, element, or the like included in the semiconductor device. Such plasma damage is not caused in the case of using a deposition method without using plasma, and thus the yield of a semiconductor device can be increased. In addition, since plasma damage does not occur in the deposition, a film with few defects can be obtained.
