摘要:
Provided is a manufacturing method of a metal oxide semiconductor material for gas sensors by which an oxide precursor and noble metal colloid particles will not readily cohere in the manufacturing process. The manufacturing process implements a precursor solution synthesis step 1 of synthesizing an oxide precursor solution in which an oxide precursor is dispersed, a pH adjustment step 3 of adjusting the pH of the oxide precursor solution, a precursor-colloid dispersion preparation step 5 of preparing an oxide precursor-noble metal colloid dispersion in which the oxide precursor and the noble metal colloid are dispersed substantially uniformly, a purifying step 7 of purifying the oxide precursor-noble metal colloid dispersion to obtain a purified oxide precursor noble metal colloid dispersion, and a freeze-drying step 11 of freeze-drying an precipitate of the purified oxide precursor-noble metal colloid dispersion.
摘要:
Provided is a manufacturing method of a metal oxide semiconductor material for gas sensors by which an oxide precursor and noble metal colloid particles will not readily cohere in the manufacturing process. The manufacturing process implements a precursor solution synthesis step 1 of synthesizing an oxide precursor solution in which an oxide precursor is dispersed, a pH adjustment step 3 of adjusting the pH of the oxide precursor solution, a precursor-colloid dispersion preparation step 5 of preparing an oxide precursor-noble metal colloid dispersion in which the oxide precursor and the noble metal colloid are dispersed substantially uniformly, a purifying step 7 of purifying the oxide precursor-noble metal colloid dispersion to obtain a purified oxide precursor noble metal colloid dispersion, and a freeze-drying step 11 of freeze-drying an precipitate of the purified oxide precursor-noble metal colloid dispersion.
摘要:
A semiconductor device having a unit lead frame defining a support with a peripheral edge and a first lead spaced from the peripheral edge. The first lead has a recess formed therein. A semiconductor chip is provided on the support. A conductive element electrically connects between the semiconductor chip and the first lead. The resin layer on the semiconductor chip and the first lead extends into the recess. The invention is also directed to a unit lead frame that is part of the semiconductor device, a lead frame incorporating a plurality of unit lead frames, and a method of manufacturing semiconductor devices.
摘要:
A lead frame for a semiconductor device. The semiconductor device has a sheet with oppositely facing sides and a thickness between the oppositely facing sides. The sheet has first and second unit lead frames. Each unit lead frame has a support for a semiconductor chip and at least one lead space from the support. The sheet has a tie bar network which connects a) the support to the at least one lead on each of the first and second lead frames and b) the first and second lead frames, each to the other. The sheet has a dividing line along which the sheet can be cut to separate the first and second lead frames from each other. The tie bar network consists of at least one tie bar extending along a substantial length of the dividing line. The support has a first thickness between the oppositely facing sides of the sheet. The at least one tie bar has a second thickness between the oppositely facing sides of the sheet over a substantial length of the dividing line that is less than the first thickness.
摘要:
An IC socket for the fine pitch IC package includes a socket body having an opening for guiding the IC package, an insulation base having a plurality of through-holes corresponding to the external terminals of the IC package, the contact pins placed in the through-holes, and a cover member for applying a predetermined pressure to bring the external terminals of the IC package and the contact pins into contact with one another. Each of the contact pins is formed with a first plunger including a terminal portion to be in contact with the external terminal of the IC package, a wider portion whose width is larger than the width of the terminal portion and the shaft whose width is equal to or smaller than the terminal portion, the coil spring, and the second plunger having a U-shape section, to be connected with the contact terminal of external circuit.
摘要:
In a contact block comprising a contact holder having multiple through-holes arranged in a position adjustment direction, two positioning pins are inserted via the through-holes to two through-holes selected from multiple through-holes formed in a contact block accommodation portion in the position adjustment direction, and thereby the relative positions of contact portions of contact terminals held by the contact holder can be adjusted with respect to terminals of a semiconductor device.
摘要:
In a contact block comprising a contact holder having multiple through-holes arranged in a position adjustment direction, two positioning pins are inserted via the through-holes to two through-holes selected from multiple through-holes formed in a contact block accommodation portion in the position adjustment direction, and thereby the relative positions of contact portions of contact terminals held by the contact holder can be adjusted with respect to terminals of a semiconductor device.