|
|
(5 intermediate revisions by 2 users not shown) |
Line 1: |
Line 1: |
| {{Proposal
| | #REDIRECT [[Milestone-Proposal:Commercialization of Multi-Layer Ceramic Capacitors with Nickel electrode (Ni-MLCCs), 1982.]] |
| |litigation=No
| |
| |more than 25 years=Yes
| |
| |within fields of interest=Yes
| |
| |benefit to humanity=Yes
| |
| |regional importance=Yes
| |
| |ou is paying=Yes
| |
| |ou is arranging dedication=Yes
| |
| |section is taking responsibility for plaque=Yes
| |
| |a11=Yes
| |
| |a3=1982
| |
| |a1=Commercialization of Multi-Layer Ceramic Capacitors with Nickel electrode (Ni-MLCCs), 1982
| |
| |plaque citation=Murata Manufacturing Co., Ltd. released new Ni-MLCCs in 1982, and has since been the world’s leading manufacturer of Ni-MLCCs. Through innovations of capacitance enhancement, fabrication miniaturization, and cost reduction, the world annual production of Ni-MLCCs has risen to 3 trillion, according as their utility is expanding in computer/network devices, home appliances, industrial equipment, and medical instruments. Now, Ni-MLCC is the key element indispensable to all electronics devices
| |
| |a2b=IEEE Kansai Section
| |
| |IEEE units paying={{IEEE Organizational Unit Paying
| |
| |Unit=Murata Manufacturing Co., Ltd.
| |
| |Senior officer name=Nagato Omori
| |
| }}
| |
| |IEEE units arranging={{IEEE Organizational Unit Arranging
| |
| |Unit=IEEE Kansai Section
| |
| |Senior officer name=Toshiharu Sugie
| |
| }}
| |
| |IEEE sections monitoring={{IEEE Section Monitoring
| |
| |Section=IEEE Kansai Section
| |
| |Section chair name=Toshinaru Sugie
| |
| }}
| |
| |Milestone proposers={{Milestone proposer
| |
| |Proposer name=Isao Shirakawa
| |
| |Proposer email=sirakawa@ai.u-hyogo.ac.jp
| |
| }}
| |
| |a4=The major historical significance of Murata’s commercialization of Ni-MLCCs is briefed as follows.
| |
|
| |
| 1. Historical background of the birth of Ni-MLCCs:
| |
| The discovery of the barium titanate (BaTiO3) ceramics with high dielectric quality in 1944 trig-gered the development of a series of multi-layer ceramic capacitors (MLCCs), such as those with Pt (platinum), Pd (palladium), and Ag (silver)-Pd electrodes, in the 1960s through the early 1970s mainly for military and industrial use because of their extremely high material prices. Although the MLCC with Ag-Pd electrode was the cheapest of all MLCCs at that time, the prices of both Ag and Pd were skyrocketing due to the 1973 oil crisis, and hence a much cheaper base metal was thirsted to be substituted for the Ag-Pd alloy. Seeing that the necessary condition for a metal to be used for the internal electrode of MLCC was that it could be co-sintered with the dielectric material at low oxygen partial pressure, Murata began to develop a new MLCC with a base metal electrode in 1974.
| |
| | |
| 2. Selection of Ni for electrode and development of new MLCCs:
| |
| Murata first focused on nickel (Ni) as a feasible candidate for the electrode of MLCC because of its very low price, and then tried to develop a dielectric material to compose MLCC with this Ni electrode, until in 1975 Murata successfully acquired the new dielectrics made of BaTiO3 ceramics with its composition BaO partly displaced by CaO [1, 2]. Through fabrication reformations [3, 4], Murata attained newly-made dielectrics which exhibited an excellent insulating performance even if co-sintered with Ni electrode. Eventually, in 1982 Murata embarked on the mass production, therefore the commercialization, of the new MLCCs with Ni electrode (Ni-MLCCs) [5, 6, 7].
| |
| | |
| 3. Achievements of commercializing new Ni-MLCCs:
| |
| Noting that as compared with the material price of Ag-Pd alloy, that of Ni was almost 1/300 in the early 1980s, it turned out that Murata’s new Ni-MLCCs extremely reduced the fabrication cost. In addition, due to the progress of the miniaturization technology as well as the surface mount technology, the industrial demands for the Ni-MLCCs grew so dramatically that Murata eventually attained the global lead in the commercialization of Ni-MLCCs. Owing to Murata’s outstanding achievements of developing the new Ni-MLCCs, Mr. Y. Sakabe, a chief engineer at Murata, won the Fulrath Award from the American Ceramic Association in 1986 [7, 8], and Murata also received the Corporate Technical Achievement Award at the American Ceramic Association’s 100th Annual Meeting in 1998 [9].
| |
| |submitted=No
| |
| }}
| |