Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Circuit for repairing defective bit in semiconductor memory device and repairing method










Image Number 2 for United States Patent #5134585.

A circuit for repairing a defective memory cell is provided between a row or column decoder and a memory cell array. When the decoder has n output lines, the memory cell array includes at least (N+1) row or column lines, where n is an integer. The repair circuit includes connection circuit for connecting the output lines of the decoder to the row or column lines, and a circuit for defining the connection of the connection circuit. The connection circuit includes n switching elements each of which is operable to connect one output line of the decoder to at least two row or column lines. The defining circuit defines the connection path of each switching element such that the output lines of the decoder is connected in one to one correspondence to successively located row or column lines excluding a row or column line connecting a defective memory cell. The defining circuit includes a series of laser programmable fuse elements provided between an operation voltage supply and a ground line. The repair circuit occupies a reduced area of a chip because of no spare decoder and no program circuit and it carries out a reliable and fast memory repair because of the reduced number of the fuse elements to be blown off.








 
 
  Recently Added Patents
Output device, source apparatus, television set, system, output method, program, and recording medium
Liquid composite compositions using non-volatile liquids and nanoparticles and uses thereof
Image processing apparatus, image display apparatus, and image processing method
Method for combining images and magnetic resonance scanner
Reconstruction of deforming surfaces by canceling ambient occlusion and refining 3-D shape
Systems and methods for facilitating communication with foundation fieldbus linking devices
Organic light emitting display apparatus
  Randomly Featured Patents
Voltage controlled oscillator with a resonant network and a reactive network, having a control loop between the networks
Plug loader
Alternating plate headerless heat exchangers
Employee-based payroll
Sunglasses
Oil supply apparatus for hermetic compressor
Load bed lift-roof cover
Laser processing machine with gas flushed beam guiding chamber
Venturi apparatus
Semiconductor device and method of bonding wires between semiconductor chip and wiring substrate