摘要:
A method for preventing void formation in a gate of a transistor formed in a substrate is disclosed. The method comprises: forming a gate oxide layer on the substrate; forming a polysilicon layer on the gate oxide layer; performing an ion implantation on the polysilicon layer, the ion implantation performed with a power approximately 30 KeV and a dosage about more than 1015 atoms/cm2; and forming a silicide layer on the polysilicon layer.
摘要:
The present invention discloses a method for simultaneously manufacturing a poly gate and a polycide gate which requires only one gate oxide layer deposition and one polysilicon layer deposition steps by incorporating a protective layer, primarily an oxide layer, which acts as a mask of a silicide. The present invention not only simplifies the process but also avoids a residual spacer in the gate. The advantages also includes widening the process window, controlling the gate channel and avoiding the gate top loss.
摘要:
A deep trench isolation structure of a high-voltage device and a method of forming thereof. An epitaxial layer with a second type conductivity is formed on a semiconductor silicon substrate with a first type conductivity. A deep trench passes through the epitaxial layer. An ion diffusion region with the first type conductivity is formed in the epitaxial layer and surrounds the sidewall and bottom of the deep trench. An undoped polysilicon layer fills the deep trench.
摘要:
A method for fabricating source/drain devices. A semiconductor substrate is provided with a gate formed thereon, a first doped area is formed on a first side of the gate on the semiconductor substrate, and a second doped area is formed on a second side of the gate on the semiconductor substrate in a manner such that the second doped area is separated from the gate by a predetermined distance. A patterned photo resist layer is formed on the semiconductor substrate having an opening on the second side, the exposed gate less than half the width of the gate. The semiconductor substrate is implanted and annealed to form a dual diffusion area on the second side of the gate using the patterned photo resist layer as a mask.
摘要:
A deep trench isolation structure of a high-voltage device and a method of forming thereof. An epitaxial layer with a second type conductivity is formed on a semiconductor silicon substrate with a first type conductivity. A deep trench passes through the epitaxial layer. An ion diffusion region with the first type conductivity is formed in the epitaxial layer and surrounds the sidewall and bottom of the deep trench. An undoped polysilicon layer fills the deep trench.
摘要:
A high-voltage device process compatible with a low-voltage device process. A high-voltage device area and a low-voltage device area are defined on an epitaxial layer of a semiconductor substrate. After forming a plurality of first gate structures on the high-voltage device area, a P-body is formed in the epitaxial layer between two adjacent first gate structures. Then, a plurality of second gate structures is formed on the low-voltage device area.
摘要:
A process for fabricating stacked capacitor, DRAM, devices, has been developed in which the surface area of the storage node has been significantly increased as a result of a unique set of deposition and annealing conditions. An amorphous polysilicon layer, used as the upper layer of the storage node, is ramped up in pure nitrogen, and then insitu annealed, to result in a polycrystalline structure, exhibiting significant surface area increases, due to the formation of surface concave and convex protrusions. The increase in storage node surface area allows for increased DRAM capacitance, without the use of larger dimension stacked capacitors, or thinner dielectrics.
摘要:
A structure for an LDMOS transistor has a horseshoe-shaped gate layer formed on an N-type layer of a semiconductor silicon substrate, in which the gate layer comprises a transverse-extending area, a first lengthwise-extending area connected to a left end of the transverse-extending area and a second lengthwise-extending area connected to a right end of the transverse-extending area. A first P-type body is formed in the N-type layer, and overlaps the left periphery of the first lengthwise-extending area of the gate layer. A second P-type body is formed in the N-type layer, and overlaps the right periphery of the second lengthwise-extending area of the gate layer.
摘要:
A fabrication method for a semiconductor device. On a semiconductor silicon substrate with a first type conductivity, an epitaxial layer with a second type conductivity and an oxide layer on the epitaxial layer are formed with at least a deep trench. Ion implantation is used to form an ion diffusion region with the first type conductivity which is formed in the epitaxial layer and surrounds the sidewall and bottom of the deep trench. An oxide liner is formed on the sidewall and bottom of the deep trench, and then an undoped polysilicon layer is formed to fill the deep trench. The combination of the ion diffusion region and the undoped polysilicon layer serves as a deep trench isolation structure.
摘要:
A method for fabricating source/drain devices. A semiconductor substrate is provided with a gate formed on the semiconductor substrate, and a hard mask layer formed on the gate. A first doped area is formed on a first side of the gate on the semiconductor substrate, and a second doped area is formed on a second side of the gate on the semiconductor substrate in a manner such that the second doped area is separated from the gate by a predetermined distance. A patterned photo resist layer is formed on the semiconductor substrate having an opening on the second side, the exposed gate equal to half the width of the gate. The semiconductor substrate is implanted and annealed to form a dual diffusion area on the second side of the gate using the patterned photo resist layer and the hard mask layer as masks.