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Introduction Procedure List of Contents Appendices Photo/Map Sitemap History
INDEX TO LIST NATURAL SCIENCE SOCIAL SCIENCE THE ARTS MISCELLANEOUS

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ELECTRONIC MATERIALS

Semiconductors

Storage No. Item Remarks Price Compartment
N-2-1-1 Germanium(Ge) Specific resistance:15 Ω cm
Sb-concentration:3x1014/cm³
75,000/kg 20
2 Silicon(Si) Specific resistance of epitaxial
layer:3.5~5.0 Ω cm(P-doped N-type)
Specific resistance of substrate:0.02 Ω cm(Sb-doped N-type)
1,763/sheet 20
3 Cadmium sulfide(CdS)   5,000/g 20(S)
4 Gallium arsenide(GaAs)   8,000/g 20(S)
5 Gallium phosphide(GaP)   100,000/g 20(S)
6 Zinc telluride(ZnTe) Specific resistance:45 Ω cm
Mobility:140cm²/Vs
Impurity concentration:1x1015/cm³
150,000/g 20(S)

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Piezoelectric Ceramics

Storage No. Item Remarks Price Compartment
N-2-2-1 Piezoelectric ceramics(PCM)(*) PbTiO3, PbZrO3, Pb(Mg.Nb)O3
ternary system
28/piece 20
2 Piezoelectric unit for gas igniter   78/piece 20
3 Pickup element   16.50/piece 20
4 TV audio signal trap resonator   25/piece 20
5 High-selectivity ceramic filter   300/piece 20
6 High temperature, high frequency(MLT)piezoelectric ceramic   3,000/piece 20

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Ferromagnetic Ceramics

Storage No. Item Price Compartment
N-2-3-1 Memory core of Mn-Mg-Li ferrite 10/piece 24
2 Memory plane of Mn-Mg-Li ferrite 4,100/set 24
3 Ni-Zn ferrite 2~3/piece 24
4 Transformer core of Ni-Zn ferrite 2~3/piece 24
5 High permeability Mn-Zn ferrite   24
6 Carrier wave filter core of low-loss, high-stability Mn-Zn ferrite 450/set 24
7 High-frequency band transformer core of super high-permeability Mn-Zn ferrite 400/set 24
8 Crucible-shaped core of Mn-Zn ferrite for 240-channel transmission 210/piece 24
9 Deflecting coil yoke of Mn-Zn ferrite for colour TV 230/piece 24
10 Hot pressed Mn-Zn ferrite(*) 6,000/piece 24
11 Multi-channel head of hot-pressed Mn-Zn ferrite for casstte tape recorder(*) 1,200/piece 24
12 Magnetic head of hot-pressed Mn-Zn ferrite for video tape recorder(*) 3,600/piece 24
13 SN coil of dust core 40/piece 24
14 Al-y-Fe garnet(Al-YIG)(*) 5,000/sphere 24

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Magnets

Storage No. Item Remarks Compartment
N-2-4-1 KS magnet Pioneering high coercive force alloy magnet 24
2 OP magnet First artificial oxide magnet 24
3 MK magnet High energy product 24
4 NKS magnet High coercive force 24
5 Vicalloy High residual magnetization 24
6 ESD magnet High energy product magnet of theoretically elongated single domain 24
7 ESD magnet powder   24(S)
8 Barium ferrite magnet High coercive force 24
9 Strontium ferrite magnet High coercive force 24
10 Pt-Co magnet High coercive force and high energy product 24
11 Mn-Al magnet High coercive force 24
12 Rare earth-Co magnet(Sm-Co) High coercive force and high energy product 24
13 Rare earth-Co magnet(Ce-Co) High coercive force and high energy product 24

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The contents of this site are excerpted from THE OFFICIAL RECORD OF TIME CAPSULE EXPO'70(March 1975). Please note that company and organization names may differ from those of the current ones.


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