Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Joon-Yeob Lee Tae-Kyung Hwang Jin-Young Kim Min Yoo Eun-Sook Sohn Ji-Young Chung Dreiza, M. |
| Copyright Year | 2007 |
| Description | Author affiliation: Amkor Technol. Korea Inc., Seoul (Joon-Yeob Lee; Tae-Kyung Hwang; Jin-Young Kim; Min Yoo; Eun-Sook Sohn; Ji-Young Chung) |
| Abstract | In spite of a great success of stacked package (PoP) in the market, some reliability issues have been raised. One of them is a board level reliability evaluation of PoP with $2^{nd}$ level underfill. Some customers have issued the application of $2^{nd}$ level underfill for PoP to improve the reliability for drop test. Unfortunately, using the $2^{nd}$ level underfill for PoP package causes reducing the reliability for thermal cycling test. Under temperature cycling test, PoP with $2^{nd}$ level underfill shows early failures before 300 cycles whereas most of samples without $2^{nd}$ level underfill survived over 1000 cycles. This paper discusses the optimal underfill material for PoP to achieve reliable board level performances. Various factors such as filler content, CTE, Tg and underfill dispensing pattern are considered. As a result, it is found that lower CTE & higher Tg underfill are better than other factors for temperature cycle performance. Non filler type underfill was passed 500 cycles for PoP but filler type underfill was passed 2500 cycles under the JEDEC JESD22-104C Condition G (-40'C~125'C, 1 cycle/hour). Especially one of non filler type underfill material with different dispensing pattern passed 1730 cycles without any failure. We assumed that this results caused by specific dispensing patterns & damping effect of non filler type underfill. In the drop test, most of underfill materials have better performances than no underfill case. Especially, several no filler type underfills have no failure until 400 drops. |
| Starting Page | 1905 |
| Ending Page | 1910 |
| File Size | 4129493 |
| Page Count | 6 |
| File Format | |
| ISBN | 1424409845 |
| ISSN | 05695503 |
| DOI | 10.1109/ECTC.2007.374059 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2007-05-29 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Testing Materials reliability Temperature Performance evaluation Electronics packaging Cellular phones Personal digital assistants Soldering Thermal stresses Tin |
| 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...
|