W. Baek, Naser Chowdhury, Lan Loi, Hyeon-Seag Kim, Sungjin Kim, A. delRosario, E. Adem, B. Tracy, J. Pak
{"title":"Optimization of NH3 plasma surface treatment using Cu silicide formation for EM/SM improvement","authors":"W. Baek, Naser Chowdhury, Lan Loi, Hyeon-Seag Kim, Sungjin Kim, A. delRosario, E. Adem, B. Tracy, J. Pak","doi":"10.1109/IRPS.2012.6241895","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241895","url":null,"abstract":"Authors investigated optimization of NH3 plasma surface pre-clean treatment using Cu silicide formation in order to improve electromigration (EM) and stressmigration (SM). NH3 plasma treatment removed Cu oxide but also led to reduced Cu silicide at the Cu/capping layer interface. Despite Cu oxide removal, EM/SM was observed to degrade due to the reduction of Cu silicide. It was critical to restore Cu silicide at the interface when employing NH3 plasma treatment to improve EM/SM.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134270739","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}
Kang-wook Lee, J. Bea, Y. Ohara, T. Fukushima, T. Tanaka, M. Koyanagi
{"title":"Impact of Cu diffusion from Cu through-silicon via (TSV) on device reliability in 3-D LSIs evaluated by transient capacitance measurement","authors":"Kang-wook Lee, J. Bea, Y. Ohara, T. Fukushima, T. Tanaka, M. Koyanagi","doi":"10.1109/IRPS.2012.6241777","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241777","url":null,"abstract":"The influence of Cu contamination from Cu through-silicon via (TSV) on device reliability in the 3-D LSI was electrically evaluated by capacitance-time (C-t) measurement. The Cu/Ta gate trench capacitors with two types of Ta barrier layers of 10-nm and 100-nm thicknesses (at the wafer surface) were fabricated. The C-t curves of the trench capacitors with 10-nm thick Ta layer were severely degraded even after the initial annealing for 5min. It means that Cu atoms diffuse into the active area from the Cu TSV through scallop portions with extremely thin Ta layer in TSVs, and consequently, the generation lifetime of minority carrier is significantly reduced. Meanwhile, the C-t curves of the trench capacitors with 100-nm thick Ta layer exhibit no change after annealing up to 60min at 300°C, but show significant degradation after the initial annealing for 5min at 400°C. The C-t analysis is a useful method to electrically characterize the influence of Cu contamination from the Cu TSV on device reliability in fabricated LSI wafers.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"95 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134394029","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}
L. Massengill, B. Bhuva, W. Holman, M. Alles, T. D. Loveless
{"title":"Technology scaling and soft error reliability","authors":"L. Massengill, B. Bhuva, W. Holman, M. Alles, T. D. Loveless","doi":"10.1109/IRPS.2012.6241810","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241810","url":null,"abstract":"This paper discusses several attributes of integrated circuit scaling in relation to radiation soft error failure modes and vulnerability.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131139787","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":"NEMS based logic and memory circuits","authors":"J. Jang, G. Amaratunga","doi":"10.1109/IRPS.2012.6241823","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241823","url":null,"abstract":"Carbon nanotube (CNT) based nano electromechanical system (NEMS) were developed to apply to the logic and the memory circuit. The electrical `on-off' behavior induced by the mechanical movements of CNTs can promise low power consumption in circuit with very low level leakage current. Additionally, the unique vertical structure of nanotubes allows high integration density for devices.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127810371","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":"Methodology for delivering reliable CIGS based building integrated photovoltaic (BIPV) products","authors":"R. Feist, M. Mills, N. Ramesh","doi":"10.1109/IRPS.2012.6241825","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241825","url":null,"abstract":"A key challenge currently limiting the wide spread acceptance of Cu(In,Ga)Se2 (CIGS) thin-film photovoltaic technologies in building integrated photovoltaic (BIPV) systems is the demonstration of product reliability in accelerated testing to support rapid product improvement cycles and new product introduction. To augment multi-year & geographically diverse real world performance a priori, one must adopt a creative approach to ensure rapid product introduction of new, highly reliable solar PV systems. Here, we present a synopsis of Dow Solar's reliability philosophy that utilizes multi-stress testing, a combination of accelerated and real world conditions, to provide predictive life stress relationships for CIGS based BIPV system level product performance. In addition, the methodology we present here includes a proactive philosophy of identifying and isolating individual reliability failure mechanisms in PV technologies. This philosophy enables significantly shorter development cycles and the obtainment of meaningful product performance feedback. The approach, which is balanced between accelerated testing and field testing data, may be utilized to establish lifetime performance of any PV technology.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115816157","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 consistent physical framework for N and P BTI in HKMG MOSFETs","authors":"K. Joshi, S. Mukhopadhyay, N. Goel, S. Mahapatra","doi":"10.1109/IRPS.2012.6241840","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241840","url":null,"abstract":"A common framework of trap generation and trapping is used to explain Negative Bias Temperature Instability (NBTI) and Positive Bias Temperature Instability (PBTI) DC and AC stress/recovery data. NBTI is explained using trap generation in Si/SiON (IL) interface and SiON (IL) bulk, together with hole trapping in pre-existing bulk SiON (IL) traps. Interface trap generation and recovery can be fully explained using Reaction-Diffusion (RD) model. PBTI is explained using trap generation in SiON (IL)/HK interface and HK bulk, together with electron trapping in pre-existing bulk HK traps. Important similarities as well as differences between N and P BTI are highlighted.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114647521","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}
A. Ivankovic, V. Cherman, G. van der Plas, B. Vandevelde, G. Beyer, E. Beyne, I. De Wolf, D. Vandepitte
{"title":"FET arrays as CPI sensors for 3D stacking and packaging characterization","authors":"A. Ivankovic, V. Cherman, G. van der Plas, B. Vandevelde, G. Beyer, E. Beyne, I. De Wolf, D. Vandepitte","doi":"10.1109/IRPS.2012.6241790","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241790","url":null,"abstract":"FET arrays are investigated from the viewpoint of Chip-Package Interaction (CPI) sensor suitability and presented as a possible solution for experimental characterization of CPI effects during 3D assembly steps: Stacking and packaging. The study presents a methodology consisting of an experimental approach with the support of FEM modeling. The use of the transistors as stress sensors covering in-plane stress components is justified, after which the applicability of the transistors to the actual stacking and packaging stress states is discussed. Calibration to in-plane stress of long and short channel transistors, p and n type, is performed to obtain sensor sensitivities and link stress to current shift by according calculated piezocoefficients. Testing the FET arrays as sensors is firstly done by means of a simple structure where a die is glued to a plastic substrate. The electrical measurements are compared to FEM models and profilometric scans. The sensors are next utilized to obtain first results from 3D stacking and packaging. The underfill - microbump mechanism in a 2-die stack is quantified and initial results on overmould impact are discussed.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117267049","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":"GaN power device and reliability for automotive applications","authors":"T. Kachi, D. Kikuta, T. Uesugi","doi":"10.1109/IRPS.2012.6241815","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241815","url":null,"abstract":"Many power switching devices are used in a hybrid vehicle (HV) and an electric vehicle (EV) systems. For future development of the HV/EV, higher performances than Si power device, for example, low on-resistance, high speed, high operation temperature, are strongly required. GaN power devices are promising candidate for the requirements. Present status of the GaN power device development is presented. Reliability of the GaN power device was also discussed.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123506682","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":"Thermomechanical reliability challenges induced by high density Cu TSVs and metal micro-joining for 3-D ICs","authors":"K. Lee, T. Fukushima, T. Tanaka, M. Koyanagi","doi":"10.1109/IRPS.2012.6241860","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241860","url":null,"abstract":"The thermo-mechanical reliability challenges induced by high-density Cu TSVs and metal micro-joining are discussed. Cu TSV with the diameter of 20-μm induced the maximum compressive stress of ~1 GPa at the Si substrate adjacent to them after annealed at 300°C. Depart from Cu TSV, the stress/strain in Si substrate changed to tensile stress and finally going to zero, where the TSV pitch is larger than twice of TSV size. However, in high density Cu TSV array with small TSV pitch, the Si substrate within small TSV spacing keep large compressive stress, which will seriously affect the mobility in active Si area, and thus device characteristics. Also, these large compressive stress leads to not only extrusion and peeling of Cu TSV, but also die cracking. The thermo-mechanical stress was produced during the bonding using high-density metal bumps. CuSn bump of 20-μm size has induced compressive stress of 140MPa beneath Si wafer surface, and it penetrates deeper area with large stress value after the bonding. The drain current and electron mobility of n-MOSFET which was located 15μm distance from microbump are changed by ~10 % due to the local tensile stress of 500 MPa induced by microbump. Electron mobility changed varying with the distance from microbump. Influences of mechanical stress induced by Cu TSVs and microbump-underill joining on device characteristics were also evaluated.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124997916","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}
Z. Xia, Dae Sin Kim, N. Jeong, Young-Gu Kim, Jae-ho Kim, Keun-Ho Lee, Young-Kwan Park, C. Chung, H. Lee, Jungin Han
{"title":"Comprehensive modeling of NAND flash memory reliability: Endurance and data retention","authors":"Z. Xia, Dae Sin Kim, N. Jeong, Young-Gu Kim, Jae-ho Kim, Keun-Ho Lee, Young-Kwan Park, C. Chung, H. Lee, Jungin Han","doi":"10.1109/IRPS.2012.6241922","DOIUrl":"https://doi.org/10.1109/IRPS.2012.6241922","url":null,"abstract":"A reliability modeling solution including endurance and data retention is developed for NAND Floating Gate Flash memory. Endurance model with trap generation considers the tunneling oxide quality distribution with process effect. Electric field and tunneling current effect also have been included. The complicated trap effect on threshold voltage and Swing shift is well explained based on non-uniformly trapped charge distribution. Thermal emission with Poole-Frenkel model and tunneling from trap to substrate are included for data retention simulation. Dominant mechanisms under high and low temperature are discussed. Broaden phenomenon of threshold voltage distribution after high temperature data retention is modeled and demonstrated based on random trap variation in tunneling Oxide.","PeriodicalId":341663,"journal":{"name":"2012 IEEE International Reliability Physics Symposium (IRPS)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127348289","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}