Journal of Quality Engineering Society
Online ISSN : 2189-9320
Print ISSN : 2189-633X
ISSN-L : 2189-633X
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Volume 1, Issue 2
Displaying 1-4 of 4 articles from this issue
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  • How　do　you　explain　"Quality　Engineering"　?　(2)
    Kazuo Tatebayashi
    1993 Volume 1 Issue 2 Pages 14-21
    Published: June 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.2_14
    JOURNAL FREE ACCESS
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    In　the　last　edition,　I　explained　that　we　used　the　SN　Ratio　to　show　system　functionabilities　and　dispersions　of　output　characteristics　in　"Quality　Engineering".　ln　this　edition,　I　would　like　to　explain how　we　should　evaluate　the　functionabilities　and　the　dispersions　in　various　conditions. When　people　evaluate　the　characteristic　dispersions,　they　make　many　samples　repeatedly,　and wait　for　random　errors　to　occur.　However,　engineers　who　know　Robust　Design　forcefully　change the　levels　of　noise(the　causes　of　dispersion)　and　input　signal　to　see　how　the　output　actually　vary.
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  • An　application　of　a　parameter　design　on　the　cerarnic grinding　processing　experimentation
    Takayoshi Matsunaga, Kazutomo Fujita, Yoshiyuki Kimura
    1993 Volume 1 Issue 2 Pages 22-28
    Published: June 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.2_22
    JOURNAL FREE ACCESS
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    The　fine　ceramics　used　for　electronic　and　mechanical　component　parts　are　generally　manufactured　through　sintering,　then　processed　to　obtain　expected　dimensions　by　grinding.　There　are many　factors　involved　in　a　grinding　process　such　as　types　of　grinding　wheels,　dressing　and　grinding conditions,　etc.　Those　factors　affect　the　grinding　performance　in　a　complex　way.　This　experiment was　conducted　in　order　to　improve　the　performance　of　the　grinding　process. In　the　experiment,　the　types　of　grinding　wheels　and　dressing　conditions　were　taken　as　control　factors,　the　grinding　wheel　moving　distance　which　changes　the　amount　ground　as　the　signal　factor, and　the　materials　to　be　processed　such　as　alumina　and　silicon,　whose　hardness　is　quite　different, were　considered　as　the　noise　factor.From　the　experiment,　a　significant　improvement　was　obtained after　optimization.
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  • PARAMETER　DESIGN　OF　FINE　LINE　PATTERNING FOR IC'S FABRICATION
    Yosuke Goda , Takeshi Fukuzawa
    1993 Volume 1 Issue 2 Pages 29-34
    Published: June 15, 1993
    Released on J-STAGE: March 24, 2016
    DOIhttps://doi.org/10.18890/qes.1.2_29
    JOURNAL FREE ACCESS
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    IC　fabrication　system　involves　six　sub-processes:　resist-spin-coating,　exposure,　development,　descurnming,　metal-evaporation,　and　resist-patterns-removal,　ln　order　to　optimize　the　whole　fabrication　system,　the　methods　of　quality　engineering　were　utilized.　ln　this　study　two　signal　factors were　used　to　develop　the　generic　function　of　product　and　the　process　engineering　simultaneously. The　SN　ratios　and　sensitivity　indexes　were　used　for　the　optimization.　As　a　result,　the　standard　deviation　was　reduced　to　one　half　in　the　initial　condition.　Thus　the　developrnent　of　technology　of　fine　line fabrication　and　the　establishment　of　the　product　engineering　are　done　effectively.
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