Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Gomes, J. Mayer, M. |
| Copyright Year | 2015 |
| Description | Author affiliation: Dept. of Mech. & Mechatron. Eng., Univ. of Waterloo, Waterloo, ON, Canada (Gomes, J.; Mayer, M.) |
| Abstract | The effect of bond geometry on bond strength and reliability is studied for 25 μm Au wire bonds on standard CMOS Al pads. An accelerated method for parameter optimization is used to produce ball bonds with optimized shear strength (SS) and target values for ball diameter of 56.5 μm, bonded ball height (BH) of 12 μm, 16 μm, and 20 μm for low, medium, and high BH, respectively. Low BH bonds achieve 126.1 MPa strength and endure up to 41.9% US before deformation begins, whereas high BH bonds achieve only 109.8 MPa strength and withstand a maximum of 39.8% US. Low BH bonds achieve higher SS possibly due to the higher level of US that can be used. Bond reliability is assessed non-destructively in high temperature storage (HTS) tests using piezoresistive stress sensors. The bonds are aged at 200 °C for ~500 h. From features in the stress sensor signals, a characteristic time $(t_{c})$ is derived during aging using an improved method. The $t_{c}$ value indicates the time it takes for the bonds to degrade severely due to intermetallics and crack formation. The $t_{c}$ values for low, medium, and high BH bonds were found to be 199.9±8.7 h, 225.9±9.5 h, and 231.9±6.8 h respectively. The result suggests ball bonds with higher BH values are more reliable than the bonds with lower BH for a constant ball bond diameter. This result is corroborated by the SS before and after aging being the same for the high BH bonds whereas SS dropped by 3% for the low BH bonds. The non-destructive method was demonstrated to have an estimated time resolution better than 10 h which allows for precise comparisons of the reliability of various processes. |
| Starting Page | 2127 |
| Ending Page | 2133 |
| File Size | 2282061 |
| Page Count | 7 |
| File Format | |
| ISBN | 9781479986095 |
| DOI | 10.1109/ECTC.2015.7159896 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-05-26 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Sensors Reliability Wires Aging Bonding Stress Gold |
| Content Type | Text |
| Resource Type | Article |
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...
|