摘要:
There is disclosed a method of manufacturing an integrated circuit, comprising: the first step of growing a first epitaxial crystal on a compound semiconductor substrate (1), removing an unnecessary region of the first epitaxial crystal to form a residual portion (5), and covering the residual portion (5) with a selective growth mask (6), the second step of growing a second epitaxial crystal on an exposed substrate portion (1), removing an unnecessary portion of the second epitaxial crystal to form a residual portion (15) of the second epitaxial crystal, and covering the residual portion (15) of the second epitaxial crystal with a selective growth mask (19), and the third step of growing a third epitaxial crystal (11) on an exposed substrate portion (1) and removing an unnecessary region of the third epitaxial crystal (11), wherein the first to third epitaxial crystal (5,15,11) form any one of a pin photodiode crystal (16), a heterojunction bipolar transistor crystal (17), and a high electron mobility transistor crystal (18), and are different from each other.
摘要:
A composite target used in alignment of layers (22-26) on a wafer uses alignment marks placed in a target area (9, 10). First alignment marks (11) are composed of material from a first layer (22) placed on the wafer. As subsequent layers (22-26) are placed on the wafer, alignment marks composed of material from the subsequent layers (23-26) are placed within the target area (9, 10). For example, alignment marks (12) composed of material from a second layer (23) are each placed adjacent to one of the alignment marks composed of material from the first layer (22). Alignment marks (13) composed of material from a third layer (24) are each placed adjacent to one of the alignment marks composed of material from the second layer (23). Alignment marks (14) composed of material from a fourth layer (25) are each placed adjacent to the alignment marks composed of material from the third layer (24). And so on. The alignment marks (11-15) are, for example, each rectangular in shape.
摘要:
There is disclosed a method of manufacturing an integrated circuit, comprising: the first step of growing a first epitaxial crystal on a compound semiconductor substrate (1), removing an unnecessary region of the first epitaxial crystal to form a residual portion (5), and covering the residual portion (5) with a selective growth mask (6), the second step of growing a second epitaxial crystal on an exposed substrate portion (1), removing an unnecessary portion of the second epitaxial crystal to form a residual portion (15) of the second epitaxial crystal, and covering the residual portion (15) of the second epitaxial crystal with a selective growth mask (19), and the third step of growing a third epitaxial crystal (11) on an exposed substrate portion (1) and removing an unnecessary region of the third epitaxial crystal (11), wherein the first to third epitaxial crystal (5,15,11) form any one of a pin photodiode crystal (16), a heterojunction bipolar transistor crystal (17), and a high electron mobility transistor crystal (18), and are different from each other.
摘要:
A DMOS transistor having a trenched gate is formed in a substrate such that the P body region of the transistor may be formed heavier or deeper while still maintaining a "short" channel. This is accomplished by forming a portion of the N+ type source region within the P body region prior to forming the trench, followed by a second implantation and diffusion of a relatively shallow extension of the N+ source region formed overlying a part of the P body region. The increased depth or doping concentration of the P body region advantageously lowers the resistance of the P body region, while the short channel lowers the on-resistance of the transistor for improved performance.
摘要:
A primary object of the present invention is to manufacture a semiconductor device which has both a high performance and a high degree of integration. The method according to this invention comprises the steps of forming a semiconductor layer (30), (31), (31') provided with recesses in its surface, forming a nitride layer (35) within the recesses, forming an oxide layer (39) over the surface of the semiconductor layer (30) using the nitride layer (35) as a mask, removing the nitride layer (35), and introducing an impurity into the semiconductor layers (31), (31') using the oxide layer (39) as a mask. This method makes it possible to form smaller elements, and is most suitable for the manufacture of an IC device which has both a high performance and a high degree of integration.