{"title":"Flip-chip-in-a-package solder joint reliability simulation","authors":"S. Groothuis, T. Jiang, Yong Du","doi":"10.1109/UGIM.2003.1225734","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225734","url":null,"abstract":"The thermomechanical failure of solder joints in semiconductor packages is a critical issue in flip-chip applications. With their low melting point, solder joints can creep even at room temperature. When the accumulated plastic strain energy in the solder reaches a critical level during thermal cycling, cracking occurs and the solder joints can fail under further cycling. The thermomechanical reliability of a generic flip-chip semiconductor package was studied using computer simulations. In this study, the test vehicle was a flip-chip package with solder bumps. In order to accurately capture the flip-chip solder joint stress conditions, a submodeling simulation technique was employed.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114862105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Laboratory facilities of the microsystems technology laboratories (MTL) at Massachusetts Institute of Technology","authors":"V. Diadiuk","doi":"10.1109/UGIM.2003.1225691","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225691","url":null,"abstract":"MTL is an Interdepartmental Laboratory of the Massachusetts Institute of Technology (MIT ) whose mission is to provide the facilities necessary to carry out research in nano- and microsystems and structures. In accordance with the multidisciplinary nature of microsystems technology, the faculty, staff, and students using MTL are affiliated with the many schools, departments, and centers of MIT.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"369 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124626919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A benzene selective electrode","authors":"L. Warner, D. Russell, J. Scaggs","doi":"10.1109/UGIM.2003.1225763","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225763","url":null,"abstract":"An innovative method for benzene detection has been created. Using polymer assisted molecular recognition an electrode sensitive to benzene has been developed. A functionalized form of thiophene (3-thiophenemethanol) is covalently attached to a template molecule (isophthaloyl dichloride), an analogue of benzene. The monomer-template complex (bis(thiene-3-ylmethyl) isophthalate) is immobilized onto a platinum electrode by polymerizing onto a bithiophene plated electrode via galvanometric solution polymerization. The template molecule is then removed by subjecting the electrode to an aqueous solution of NaOH at approximately pH 10 for 2-3 minutes. This removal opens a \"binding site\" for benzene. Reversible cyclic voltammetric waves show that benzene does interact with the \"binding sites\" when compared to pure thiophene and bare platinum.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128626408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimization of Bosch etch process for through wafer interconnects","authors":"L. Kenoyer, R. Oxford, A. Moll","doi":"10.1109/UGIM.2003.1225759","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225759","url":null,"abstract":"The Bosch etch process was utilized to create 50 micrometer vias with an aspect ration of 10:1 in silicon wafers for through wafer interconnects. The process is complex with twenty-two separate parameters required to control the process. Deviating from the standard process and flowing SF/sub 6/ during the deposition process resulted in a more stable and reproducible process.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129932897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Gunturu, T. Haskett, T. Corsetti, M. Engle, J. Prasad
{"title":"Characterization of the effect of TiN oxidation on via resistance","authors":"K. Gunturu, T. Haskett, T. Corsetti, M. Engle, J. Prasad","doi":"10.1109/UGIM.2003.1225695","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225695","url":null,"abstract":"A failure mechanism due to presence of an oxygen interface at the via bottom was identified. Our in depth experimental analysis indicate that this interface layer is formed due to oxidation of TiN layer during oxygen plasma exposure and the marginality of the RF sputter etch step that is performed prior to via barrier deposition. TEM and EDX analysis of high resistance vias confirmed the presence of an oxidation TiN layer at the bottom of the via.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131692232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhanced hot-carrier induced degradation in pMOSFETs stressed under high gate voltage","authors":"J.F. Chen, C. Tsao, T. Ong","doi":"10.1109/UGIM.2003.1225732","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225732","url":null,"abstract":"Enhanced hot-carrier induced drain current degradation under high gate voltage stress is observed in pMOSFETs. Electron tunneling from the gate plus Auger recombination assisted hot-hole energy gain process is responsible for this phenomenon. This enhancement in drain current degradation is more severe for devices with thinner gate oxide, or devices operated under higher temperature or lower drain voltage.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126592914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Low-latency multiple clock domain interfacing without alteration of local clocks","authors":"S.F. Smith, J. Frenzel","doi":"10.1109/UGIM.2003.1225761","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225761","url":null,"abstract":"A method for interfacing synchronous blocks of logic with different local clocks is presented which introduces very little latency and avoids metastability. The method does not require stopping or stretching local clocks and enforces correct operation of a bundled data constraint for all but very wide data paths.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"324 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115869399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Teaching vacuum technology using spreadsheet calculations","authors":"R. E. Pearson, G. Atkinson","doi":"10.1109/UGIM.2003.1225757","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225757","url":null,"abstract":"Vacuum technology is an important part of nano-fabrication. Automated control systems for vacuum equipment have made operation easy and safe but have also isolated the user from the need to understand the physics of vacuum systems. In spite of this, many equipment and process decisions revolve around choices made concerning the vacuum components of a processing tool. Students can use a spreadsheet to calculate the pump down pressure characteristic in a chamber for various non ideal conditions and combinations of single and multiple stage pumps. The calculations can be compared to characteristics of real pump/chamber systems that are available in the user's laboratory. This develops a much deeper understanding of the design and operation of modern vacuum systems. The calculations are also a good way to introduce or review numerical techniques.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134572627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Neural network modeling of the resistance of metallized vias formed by laser ablation in polymer dielectrics","authors":"R. Setia, G. May","doi":"10.1109/UGIM.2003.1225733","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225733","url":null,"abstract":"Laser ablation, a material removal process that uses localized thermal energy caused by stimulated radiation, has become an important process in the fabrication of microelectronic packaging substrates, particularly in the fabrication of vias. During laser ablation, debris in the form of carbon residue is generated as a by-product. In this paper, resistance measurements on metal deposited in ablated vias are conducted to characterize the degree to which debris remaining inside the vias affects their quality. Vias with diameters of 10-50 /spl mu/m are ablated in DuPont Kapton/spl reg/ E polyimide using an Anvik HexScan/spl trade/ 2150 SXE excimer laser. A statistical experiment using a 2/sup 5-1/ fractional factorial design is conducted to characterize five process conditions, namely: laser energy, shot frequency, number of pulses, and the vertical and horizontal positions of the debris removal system in the laser tool. Measurements indicate that 10, 20, and 30 /spl mu/m vias are not opened by any combination of the five process conditions. As for the 40 and 50 /spl mu/m vias, both number of pulses and the horizontal position of the debris removal system, as well as their two-term interaction, are found to be statistically significant (p-value<0.05). Following the collection of the experimental data, neural networks are trained and subsequently tested to model the measured resistance through the metallized 40 and 50 /spl mu/m vias. Results indicate that the prediction error of these models is less than 15%.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"431 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133819298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Lawrence, B. Cheek, T.E. Lawrence, S. Kumar, A. Haggag, R. J. Baker, W. B. Knowlton
{"title":"Gate dielectric degradation effects on nMOS devices using a noise model approach","authors":"C. Lawrence, B. Cheek, T.E. Lawrence, S. Kumar, A. Haggag, R. J. Baker, W. B. Knowlton","doi":"10.1109/UGIM.2003.1225739","DOIUrl":"https://doi.org/10.1109/UGIM.2003.1225739","url":null,"abstract":"The effects of noise on gate oxide reliability were examined in nMOSCAPs. Noise is modeled as a voltage spike constructively interfering with a carrier signal. This data correlates to the noise model where device lifetime exponentially decreases with an increase in noise voltage. Noise voltages with the same magnitude as the carrier signal voltage decrease the lifetime by as much as three orders of magnitude. For noise that is one-fifth of the magnitude of the carrier signal voltage, an order of magnitude is observed. As interconnect spacing decreases, the probability of noise and capacitive coupling increases; therefore, the effect of noise on the lifetime of MOS devices may be of great concern.","PeriodicalId":356452,"journal":{"name":"Proceedings of the 15th Biennial University/Government/ Industry Microelectronics Symposium (Cat. No.03CH37488)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121853630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}