Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Darveaux, R. |
| Copyright Year | 2005 |
| Description | Author affiliation: Amkor Technol., Inc., Chandler, AZ, USA (Darveaux, R.) |
| Abstract | The deformation behavior of lead free solder joints was characterized under shear loading. The test vehicle was a 0.5mm pitch wafer level chip scale package (WLCSP). Five alloys were compared: Sn/sub 63/Pb/sub 37/, Sn/sub 95.5/Ag/sub 4.0/Cu/sub 0.5/, Sn/sub 96.5/Ag/sub 3.0/Cu/sub 0.5/, Sn/sub 96.5/Ag/sub 3.5/, and Sn/sub 99.3/Cu/sub 0.7/. The strain rate range was between 1.0/sec and 10/sup -7//sec, and test temperature was 25C. Both un-aged and thermally aged samples were tested. The aging condition was 24hrs at 125C. At strain rates of 10/sup -2//sec and above, all of the alloys had comparable strength, except for Sn/sub 99.3/Cu/sub 0.7/, which had 20% to 30% lower strength. Sn/sub 63/Pb/sub 37/ was the most strain rate sensitive, and hence had the lowest strength below 10/sup -4//sec strain rate. All alloys showed a 10% to 30% reduction in strength with aging. The solder joints exhibited very high ductility. In some cases strains of 100% were achieved before the joints started to fail. The ductility of Sn/sub 63/Pb/sub 37/ increased with aging, but the ductility of the lead free alloys all decreased with aging. Sn/sub 96.5/Ag/sub 3.0/Cu/sub 0.5/ showed the largest decrease in ductility with aging. The steady state creep behavior observed in the current study is fairly consistent with other published work. However, the absolute value of the joint strength is a little higher than data on bulk samples. All of the alloys exhibited significant primary creep before steady state conditions were achieved. This behavior is not always reported in the literature, and hence it deserves more investigation. |
| Starting Page | 882 |
| Ending Page | 893 |
| File Size | 700388 |
| Page Count | 12 |
| File Format | |
| ISBN | 0780389077 |
| ISSN | 05695503 |
| DOI | 10.1109/ECTC.2005.1441377 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-05-31 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Environmentally friendly manufacturing techniques Lead Soldering Tin Aging Capacitive sensors Testing Copper alloys Steady-state Creep |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|