摘要:
An ultrasonic inspection instrument for detecting a crack and performing sizing in the depth direction of the crack. By a transmitter element array and a receiver element array included in a common sensor, focus points between focused acoustic fields are electronically scanned in a range including a location where half the sum of the transmitting angle of ultrasonic waves to an inspection-target material and the receiving angle of diffraction echoes from the inspection-target material is 30 degrees, so that a tip portion of the crack is detected from the received diffraction echoes. Thus, the detectability of the ultrasonic inspection instrument for detecting diffraction waves in a subject to be inspected and performing crack inspection is stabilized and kept high.
摘要:
Disclosed is an eddy current flaw detection probe that is capable of pressing itself against an inspection target whose curvature varies. A flaw sensor is configured by fastening a plurality of coils to a flexible substrate that faces the surface of the inspection target. A first elastic body is positioned opposite the inspection target for the flaw sensor, is obtained by stacking two or more elastic plates, and has an elastic coefficient that varies in a longitudinal direction. A second elastic body is a porous body positioned between the flexible substrate and the first elastic body. A pressure section is employed to press the first elastic body toward the inspection target.
摘要:
Example embodiments provide a semiconductor memory device and a method of verifying the same. The semiconductor memory device may include: a memory including a plurality of memory cells; a verifier determining a program state of the memory cell in the memory; and/or an address/program controller controlling the memory and the verifier. Example embodiments include making the memory start a suspend operation during an operation of the memory cell, and/or starting a verify operation when the suspend operation terminates. The address/program controller may start the operation on the memory cell if it is determined that a repeat operation is necessary, and may start the program operation on the next memory cell if it is determined that a repeat operation is unnecessary. The memory operation mode may be one in which a verify operation is not performed before programming.
摘要:
Disclosed is an eddy current flaw detection probe that is capable of pressing itself against an inspection target whose curvature varies. A flaw sensor is configured by fastening a plurality of coils to a flexible substrate that faces the surface of the inspection target. A first elastic body is positioned opposite the inspection target for the flaw sensor, is obtained by stacking two or more elastic plates, and has an elastic coefficient that varies in a longitudinal direction. A second elastic body is a porous body positioned between the flexible substrate and the first elastic body. A pressure section is employed to press the first elastic body toward the inspection target.
摘要:
A non-volatile semiconductor memory device includes a non-volatile memory cell array and a control circuit for controlling writing-in to the memory cell array. In the stage before an erasing pulse adding in an erasing process where data of written-in memory cells is erased, the control circuit detects a programming speed when writing-in to the memory cell array, determines a programming start voltage corresponding to the programming speed for every block or every word line, stores the determined programming start voltage in the memory cell array and reads-out the programming start voltage from the memory cell array to write-in predetermined data.
摘要:
Example embodiments provide a semiconductor memory device and a method of verifying the same. The semiconductor memory device may include: a memory including a plurality of memory cells; a verifier determining a program state of the memory cell in the memory; and/or an address/program controller controlling the memory and the verifier. Example embodiments include making the memory start a suspend operation during an operation of the memory cell, and/or starting a verify operation when the suspend operation terminates. The address/program controller may start the operation on the memory cell if it is determined that a repeat operation is necessary, and may start the program operation on the next memory cell if it is determined that a repeat operation is unnecessary. The memory operation mode may be one in which a verify operation is not performed before programming.