著者

北野 誠

出版者

The Japan Institute of Electronics Packaging

雑誌

サーキットテクノロジ (ISSN:09148299)

巻号頁・発行日

vol.7, no.5, pp.334-340, 1992-09-20 (Released:2010-03-18)

参考文献数

13

著者

北野 誠 西村 朝雄 河合 末男

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 A編 (ISSN:03875008)

巻号頁・発行日

vol.57, no.538, pp.1398-1405, 1991-06-25 (Released:2008-02-21)

参考文献数

5

被引用文献数

2 1

---

The plastic packages of ICs have been changing from insertion types to surface mounted types. Reflow soldering is used for surface mounted ICs onto printed circuit boards. During this process, packages are heated to above 200°C. If the encapsulant absorbs moisture, package cracking may occur during the reflow soldering. It is known that the cracks are caused by vapor pressure generated inside the packages, causing excessive stress in the plastic. In the former report, moisture diffusion analysis in the plastic was performed and vapor pressure could be obtained. Since the edge tip of the chip pad where package cracking occurs is a singular point within the elastic stress field, strength evaluation for package cracking is not established. In this study, the quantitative strength evaluation of the plastic is investigated by using the stress singularity theory.

著者

北野 誠一 Seiichi Kitano

出版者

桃山学院大学総合研究所

雑誌

桃山学院大学社会学論集 (ISSN:02876647)

巻号頁・発行日

vol.23, no.2, pp.p65-84, 1990-03

---

In U.S.A., citizens with disabilities who seek independent living get necessary services through CIL (the Center for Independent Living), which serves as their adovocate. These main necessary services consist of (i) Income Security, (ii) Attendent Service, (iii) Accesible Housing Service. In Japan, there are not yet services necessary for citizens with disabilities to live independently. But, (1) Social Action Groups who seek independent living, (2) Group Homes where persons with disabilities manege by themselves, and (3) Sheltered Workshops where persons with disabilities manege by themselves, are now stimulating many members with disabilities to seek independent living. Therefore, soon Japanese persons with disabilities will need something like a CIL. Generally speaking, CIL has 10 programs as follows; 1. Peer Counseling 2. Independent Living Skill Training 3. Adovocacy (System Adovocacy and Personal Adovocacy) 4. Attendant Referral and Counseling 5. Accesible Housing Referral and Counseling 6. Educational program for Community Members 7. Referral of Reading and Guiding Helpers 8. Referral of Sign language Interpreters 9. Equipment Referral and Counseling 10. Dial-A-Ride Vihicles Services In my views, the essential programs of CIL belong to the first three catagories, the others are not always nesessary. The Goverment ought to offer funds to the CILs where these three essential programs function. In the future, Japanese CILs should work toward the enactment of a Japanese version of the ADA (Americans with Disabilities Act) or Civil Rights Act.

著者

能瀬 春雄 坂根 政男 北野 誠 塚田 裕 高橋 浩之 向井 稔

出版者

一般社団法人エレクトロニクス実装学会

雑誌

エレクトロニクス実装学術講演大会講演論文集 第17回エレクトロニクス実装学術講演大会

巻号頁・発行日

pp.26, 2003 (Released:2003-10-14)

---

電子デバイスの高密度実装化や高発熱化に伴い,電子デバイスの電気・機械的接合に用いられるはんだ接合部の使用環境はより厳しくなり,信頼性の高い強度評価法が求められている.しかし,これまで,はんだの引張および低サイクル疲労試験法は信頼できる標準的な手法が確立していなかった.本報告では,日本材料学会高温強度部門委員会で策定した,「はんだの引張試験法標準」および「はんだの低サイクル疲労試験法標準」について報告する.また,同試験法によって得られた,鉛系および非鉛系はんだのデ_-_タベ_-_スについても紹介する.