Abstract:
A method for forming a semiconductor device is disclosed. A method for forming a semiconductor device includes forming a first hard mask layer over a semiconductor substrate including a cell region and a peripheral circuit region, forming a spacer pattern over the first hard mask layer of the cell region, forming a cell-open mask pattern over the peripheral circuit region, forming a first hard mask pattern by etching the first hard mask layer using the spacer pattern of the cell region as an etch mask, forming a second hard mask layer over the first hard mask pattern of the cell region and a first hard mask layer of the peripheral circuit region, forming a cutting mask pattern over the second hard mask layer; and forming an active region in the cell region and a device isolation region in the peripheral circuit region by etching the second hard mask layer, the first hard mask pattern of the cell region, the first hard mask layer of the peripheral circuit region, and the semiconductor substrate using the cutting mask pattern as an etch mask.
Abstract:
The present invention relates to a novel 1,3-diphenylpropane derivative having an inhibitory activity against tyrosinase represented by the following formula (I): ##STR1## in which - - represents double or single bond,R.sub.1 represents hydrogen or C.sub.1 -C.sub.10 alkyl,R.sub.2 represents C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkoxyalkyl, orR.sub.1 and R.sub.2 together represent a 5 to 6 membered heterocycle which can be substituted by C.sub.1 -C.sub.5 alkyl and which contains oxygen as the hetero atom,R.sub.3 represents hydrogen or C.sub.1 -C.sub.7 alkyl,R.sub.4 represents hydrogen, hydroxy, or oxo, andR.sub.5 and R.sub.6 mindependently of one another represent hydrogen or C.sub.1 -C.sub.5 alkyl.
Abstract:
Provided are an electronic system, an integrity verification device, and a method of performing an integrity verification operation. The electronic system includes: a memory device; a processor configured to provide a plurality of configuration records corresponding to a plurality of verification data stored in the memory device, each of the configuration records including a start address, a data length, and a reference hash value for a corresponding verification data; and an integrity verification device configured to: store the configuration records, select a configuration record, directly access the memory device to read verification data, corresponding to the selected configuration record, based on the start address and the data length included in the selected configuration record, perform a hash operation on the verification data to obtain a verification hash value, and output an interrupt signal based on the verification hash value and the reference hash value comprised in the selected configuration record.
Abstract:
A method for forming a semiconductor device is disclosed. A method for forming a semiconductor device includes forming a first hard mask layer over a semiconductor substrate including a cell region and a peripheral circuit region, forming a spacer pattern over the first hard mask layer of the cell region, forming a cell-open mask pattern over the peripheral circuit region, forming a first hard mask pattern by etching the first hard mask layer using the spacer pattern of the cell region as an etch mask, forming a second hard mask layer over the first hard mask pattern of the cell region and a first hard mask layer of the peripheral circuit region, forming a cutting mask pattern over the second hard mask layer; and forming an active region in the cell region and a device isolation region in the peripheral circuit region by etching the second hard mask layer, the first hard mask pattern of the cell region, the first hard mask layer of the peripheral circuit region, and the semiconductor substrate using the cutting mask pattern as an etch mask.