Samsung Electronics Co., Ltd.

Byung-Jun Hwang

Kun-Ho Kwak

Soon-Moon Jung

Jae-hoon Jang

Do-Hyung Kim

Jin-Ho Kim

Sung-Jin Kim

Hoon Lim

Jong-Hyuk Kim

Won-seok Cho

Han-soo Kim

Myang-Sik Han

Kwang-Ok Koh

A static random-access memory (SRAM) device may include a bulk MOS transistor on a semiconductor substrate having a source/drain region therein, an insulating layer on the bulk MOS transistor, and a thin-film transistor having a source/drain region therein on the insulating layer above the bulk MOS transistor. The device may further include a multi-layer plug between the bulk MOS transistor and the thin-film transistor. The multi-layer plug may include a semiconductor plug directly on the source/drain region of the bulk MOS transistor and extending through at least a portion of the insulating layer, and a metal plug directly on the source/drain region of the thin-film transistor and the semiconductor plug and extending through at least a portion of the insulating layer. Related methods are also discussed.

Node contact structures in semiconductor devices

Semiconductor integrated circuits that include thin film transistors (TFTs) and methods of fabricating such semiconductor integrated circuits are provided. The semiconductor integrated circuits may include a bulk transistor formed at a semiconductor substrate and a first interlayer insulating layer on the bulk transistor. A lower TFT may be on the first interlayer insulating layer, and a second interlayer insulating layer may be on the lower TFT. An upper TFT may be on the second interlayer insulating layer, and a third interlayer insulating layer may be on the upper TFT. A first impurity region of the bulk transistor, a first impurity region of the lower TFT, and a first impurity region of the upper TFT may be electrically connected to one another through a node plug that penetrates the first, second and third interlayer insulating layers.

Semiconductor integrated circuits with stacked node contact structures

A semiconductor device having LDD-type source/drain regions and a method of fabricating the same are provided. The semiconductor device includes at least a pair of gate patterns disposed on a semiconductor substrate and LDD-type source/drain regions disposed at both sides of the gate patterns. The substrate having the gate patterns and the LDD-type source/drain regions is covered with a conformal etch stop layer. The etch stop layer is covered with an interlayer insulating layer. The LDD-type source/drain region is exposed by a contact hole that penetrates the interlayer insulating layer and the etch stop layer. The method of forming the LDD-type source/drain regions and the etch stop layer includes forming low-concentration source/drain regions at both sides of the gate patterns and forming the conformal etch stop layer on the substrate having the low-concentration source/drain regions. Gate spacers are then formed on the sidewalls of the gate patterns. Using the gate patterns and the gate spacers as implantation masks, impurity ions are implanted into the semiconductor substrate to form high-concentration source/drain regions. The spacers are then selectively removed. An interlayer insulating layer is formed on the substrate where the spacers are removed.

Semiconductor device having LDD-type source/drain regions and fabrication method thereof

Methods of fabricating semiconductor devices are provided. An interlayer insulating layer is provided on a single crystalline semiconductor substrate. A single crystalline semiconductor plug is provided that extends through the interlayer insulating layer and a molding layer pattern is provided on the semiconductor substrate and the single crystalline semiconductor plug. The molding layer pattern defines an opening therein that at least partially exposes a portion of the single crystalline semiconductor plug. A single crystalline semiconductor epitaxial pattern is provided on the exposed portion of single crystalline semiconductor plug using a selective epitaxial growth technique that uses the exposed portion of the single crystalline semiconductor plug as a seed layer. A single crystalline semiconductor region is provided in the opening. The single crystalline semiconductor region includes at least a portion of the single crystalline semiconductor epitaxial pattern.

Methods of fabricating semiconductor devices having thin film transistors

Methods of fabricating a semiconductor integrated circuit having thin film transistors using an SEG technique are provided. The methods include forming an inter-layer insulating layer on a single-crystalline semiconductor substrate. A single-crystalline semiconductor plug extends through the inter-layer insulating layer, and a single-crystalline epitaxial semiconductor pattern is in contact with the single-crystalline semiconductor plug on the inter-layer insulating layer. The single-crystalline epitaxial semiconductor pattern is at least partially planarized to form a semiconductor body layer on the inter-layer insulating layer, and the semiconductor body layer is patterned to form a semiconductor body. As a result, the semiconductor body includes at least a portion of the single-crystalline epitaxial semiconductor pattern. Thus, the semiconductor body has an excellent single-crystalline structure. Semiconductor integrated circuits fabricated using the methods are also provided.

Methods of fabricating semiconductor integrated circuits using selective epitaxial growth and partial planarization techniques

Methods of forming a semiconductor device are provided by forming a gate pattern that includes a gate electrode on a substrate. Lightly doped impurity diffusion layers are formed in the substrate at both sides of the gate pattern. Spacers are formed on sidewalls of the gate pattern. The spacers having a bottom width. Impurity ions are implanted using the gate pattern and the spacer as a mask to form a heavily doped impurity diffusion layer in the substrate. The spacers are removed. A conformal etch stop layer is formed on the gate pattern and the substrate. The etch stop layer is formed to a thickness of at least the bottom width of the spacers.

Methods of forming semiconductor devices using an etch stop layer

A method of forming a CMOS type semiconductor device comprises forming a gate electrode pattern on a surface of a substrate in NMOS and PMOS regions, forming spacers on side walls of the gate electrode pattern in the NMOS and PMOS regions, and doping n and p-type impurities heavily to the surface of the substrate in the NMOS and PMOS regions, respectively. After doping the p and n-type impurities heavily, the spacers are removed. The method further includes doping the n and p-type impurities lightly to the surface of the substrate in the NMOS and PMOS regions on which the spacers are removed. Alternatively, the light impurity implantation can be carried out before forming the spacers. Also, the light impurity implantation can be carried out to the surface of the substrate in one of the NMOS and PMOS regions before forming the spacers and to the surface of the substrate in the other of the NMOS and PMOS regions after removing the spacers.

Growing community of inventors

Gyeonggi-do, South Korea

Byung-Jun Hwang