摘要:
In a thin film transistor, each of an upper electrode and a lower electrode is formed of at least one material selected from the group consisting of a metal and a metal nitride, represented by TiN, Ti, W, WN, Pt, Ir, Ru. A capacitor dielectric film is formed of at least one material selected from the group consisting of ZrO.sub.2, HfO.sub.2, (Zr.sub.x, Hf.sub.1−x)O.sub.2 (0
摘要:
In a conventional semiconductor device, an excessive etching occurs in a section where an opening for contact plug is formed, causing a damage to a diffusion layer located under the opening.A semiconductor device 1 includes a region D1 for forming an electric circuit, and a seal ring 30 (guard ring) that surrounds the region D1 for forming the electric circuit. A DRAM 40 is formed in the region D1 for forming the electric circuit. Interlayer insulating films 22, 24, 26 and 28 are formed on a semiconductor substrate 10. The seal ring 30 is formed in the interlayer insulating films 22, 24, 26 and 28, and at least a portion there of is located spaced apart from the semiconductor substrate 10.
摘要:
A semiconductor memory device has bit lines, capacitors, bit contacts and capacitor contacts, wherein the bit lines are provided over a semiconductor substrate, the bit lines are connected to the semiconductor substrate through the bit contacts, the capacitors are connected to the semiconductor substrate through the capacitor contacts, and wherein in two adjacent bit lines, pitch d2 (first pitch) representing a pitch of portions provided with the capacitor contacts is larger than pitch d3 (second pitch) representing a pitch of portions provided with the bit contacts, and distance d4 between two such bit lines in the portions provided with the bit contacts is larger than width d5 of the bit lines in the portions provided with the bit contacts.