Philippe Descamps - Academia.edu (original) (raw)
Papers by Philippe Descamps
Microelectronics and Reliability, 2004
ABSTRACT
Proceedings of the 12th International Symposium on the Physical and Failure Analysis of Integrated Circuits, 2005. IPFA 2005., 2005
Our case study has shown the efficiency of isolating failing sites (shorts, opens) in IC packages... more Our case study has shown the efficiency of isolating failing sites (shorts, opens) in IC packages using TDR and especially sequential comparative TDR analysis, which allowed to overcome some of TDR hardware limitations and to identify the different regions of the DUT. Currently, it's possible to increase the bandwidth of the main standard TDR sources available on the market up
IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society, 2011
The scanning acoustic microscopy (SAM) is widely used today by the manufacturers and researchers ... more The scanning acoustic microscopy (SAM) is widely used today by the manufacturers and researchers in failure analysis labs to improve the microelectronic devices reliability. The goal is to detect and locate flaws inside chips using non destructive test (NDT). New packaging technologies improve the number of layers in a single package using advancing formats including for example flip chip, ball grid array and thereby increasing the number of interfaces to study. This paper deals with the automatic detection of small flaws in the z-axis to reduce time of experiment and facilitate the localization of the flaws especially in solder bump joints and underfill.
Microwave and Optical Technology Letters, 2010
ABSTRACT
2009 IEEE Radio Frequency Integrated Circuits Symposium, 2009
In this paper electromagnetic (EM) based segmentation methodology is proposed for design, analysi... more In this paper electromagnetic (EM) based segmentation methodology is proposed for design, analysis and simulation of inductive couplings in RFICs. The efficiency of the proposed methodology is demonstrated through its application to NXP-Semiconductors component and function-block test-carriers. The obtained simulation results are successfully correlated to measurement results and other relevant methods and techniques. Different segmentation strategies are compared to draw
Advanced Materials Research, 2013
81st ARFTG Microwave Measurement Conference, 2013
Ultrasound in Obstetrics and Gynecology, 2005
Objectives This study compared the accuracy of ultrasound cervical assessment (cervical length an... more Objectives This study compared the accuracy of ultrasound cervical assessment (cervical length and cervical index) and digital examination (Bishop score and cervical score) in the prediction of spontaneous birth before 34 weeks in twin pregnancies.
Ultrasound in Obstetrics and Gynecology, 2003
unknown. Our goal is to conduct a randomized clinical trial (RCT) on expectant management vs. las... more unknown. Our goal is to conduct a randomized clinical trial (RCT) on expectant management vs. laser therapy in patients with previable SIUGR and absent or reverse end-diastolic velocity in the umbilical artery (AREDV). Methods: Selection criteria: gestational age 16-26 weeks, monochorionic/diamniotic, absence of congenital anomalies, estimated fetal weight of SIUGR fetus < 10th percentile, AREDV. Patients will be randomized to either the expectant management (group I) or selective laser therapy (group II). Outcome measures will include neonatal survival and neurological morbidity. Preliminary results: Thirty-eight patients in our registry form the basis for the trial: 17 in group I, and 21 in group II. Neither survival rates for at least one fetus (14/17 or 82.3% vs. 18/21 or 85.7%, p = 0.7), nor neurological handicap in surviving fetuses (3/22 or 13.6% vs. 0/20, p = 0.08) were significantly different between groups I and II, respectively. Conclusions: An RCT comparing expectant management vs. laser therapy for the management of patients with SIUGR is indicated.
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2007
ABSTRACT Scanning capacitance microscopy (SCM) is a doping profile extraction using a nanometric ... more ABSTRACT Scanning capacitance microscopy (SCM) is a doping profile extraction using a nanometric probe as a gate of a metal-oxide-semiconductor (MOS) structure and measuring the differential capacitance. Thanks to the complete MOS equations, the authors propose in this article a description of the differential capacitance calculation. This analytic presentation is based on the solution of the Poisson-Boltzmann equation in the unidimensional mode in silicon and a decomposition of the probe in elementary rings giving capacitance from the surface probe and silicon. As [dC(Vg)/dVg]α(dΨs/dVg) , this presentation yields to the importance of the surface band bending Ψs at the oxide-semiconductor interface. The dC(Vg)/dVg calculation shows that the contact of the probe with the sample has its main contribution over a few nanometers. Results are discussed to obtain a calibration of a SCM probe available in a large range of doping and voltage and to assess the dC(Vg)/dVg signal after erosion of the probe by successive scans.
Fertility and Sterility, 2014
The relationship between ovarian cysts and infertility is a subject of debate, mainly because it ... more The relationship between ovarian cysts and infertility is a subject of debate, mainly because it is difficult to determine the real impact of the cyst and its treatment on later fertility. For a long time it was hoped that surgical treatment could prevent potential complications (such as rupture or malignancy). For presumed benign ovarian tumors, fertility sparing should be the main concern. The goal of this survey of current knowledge on the subject is to thoroughly explore the potential relationship between cysts, their treatment, and infertility. Our study is based on a review of the literature dealing with the epidemiology of ovarian cysts and the effects of their surgical management in relation to infertility. Analysis of the epidemiologic data, drawn mainly from comparative studies and cohorts, shows that the role of cysts in infertility is controversial and that the effects of surgical treatment are often more harmful than the cyst itself to the ovarian reserve. Surgery does not seem to improve pregnancy rates. When a surgical option is nonetheless chosen, a conservative laparoscopic approach is more suitable. Besides excision, sclerotherapy and plasma vaporization are promising, offering a greater preservation of the ovarian parenchyma, especially in endometriomas. These techniques must be better defined. The context of the infertility is essential, and surgeons and specialists in reproductive medicine should decide management jointly.
Clinical Nutrition, 2009
Background & aims: Infants born with severe IUGR are exposed to higher neonatal mortality and mor... more Background & aims: Infants born with severe IUGR are exposed to higher neonatal mortality and morbidity rates, as compared with appropriate-for-gestational-age. They are exposed to a higher risk of developing chronic disease such as hypertension, coronary artery disease, obesity, and type 2 diabetes in adulthood. L-Arginine is a precursor of nitric oxide (NO) and may play a role in placental vascular mediation or local vasodilatation.
Australian and New Zealand Journal of Obstetrics and Gynaecology, 2009
Conclusions: Pre-eclampsia per se does not influence heart function in IUGR fetuses.
American Journal of Obstetrics and Gynecology, 2002
Our aim was to determine the accuracy of cervical length and funneling of the internal os in the ... more Our aim was to determine the accuracy of cervical length and funneling of the internal os in the prediction of the spontaneous very preterm birth of twin pregnancies. STUDY DESIGN: In a prospective study at 13 centers, routine transvaginal ultrasound scanning was used to examine 251 women with twin pregnancies at 22 weeks of gestation and 215 women at 27 weeks of gestation; cervical length, spontaneous cervical funneling, and funneling after transfundal pressure were evaluated. Receiver operating characteristic curve analysis was used to determine the best cervical length for the prediction of spontaneous preterm birth before 32 and 35 weeks of gestation. We calculated the sensitivity, specificity, and predictive values for cervical length and for funneling. RESULTS: The median gestational age at delivery was 36 weeks in both populations. Of the population that was included at 22 weeks of gestation, 5.2% (13 women) gave birth spontaneously before 32 weeks of gestation, and 13.2% (33 women) gave birth spontaneously before 35 weeks of gestation; the median cervical length was 40 mm. The receiver operating characteristic curve showed no clear best cutoff point for cervical length. For spontaneous delivery before 32 and 35 weeks of gestation, the sensitivity of cervical length ≤30 mm was 46% and 27%, respectively; the specificity was 89% and 90%, respectively. The sensitivity of funneling was 54% and 33%, and its specificity 89% and 91%, respectively. After multivariate analysis, only funneling remained significant for delivery before both 32 and 35 weeks of gestation. Of the population that was included at 27 weeks, 3.3% (7 women) gave birth spontaneously before 32 weeks of gestation, and 12.4% (26 women) gave birth spontaneously before 35 weeks of gestation; the median cervical length was 35 mm. The receiver operating characteristic curve showed 25 mm to be the best cutoff point for cervical length. For spontaneous delivery before 32 and 35 weeks of gestation, the sensitivity of cervical length ≤25 mm was 100% and 54%, respectively, and the specificity was 84% and 87%, respectively. The sensitivity of funneling was 86% and 54%, and the specificity 78% and 82%, respectively. After multivariate analysis, both indicators remained significant for delivery before 35 weeks of gestation. Funneling after transfundal pressure at 22 or 27 weeks did not predict very preterm delivery. CONCLUSION: Cervical length and funneling both predict the very preterm birth of twins. Although cervical length is the predictor of choice at 27 weeks of gestation, at 22 weeks of gestation the diagnostic values of both parameters are close. (Am J Obstet
American Journal of Obstetrics and Gynecology, 2008
We report a case of spontaneous rupture of an ovarian artery aneurysm, 5 days after delivery. Sev... more We report a case of spontaneous rupture of an ovarian artery aneurysm, 5 days after delivery. Severe abdominal pain justified a computed tomography scan, which revealed a massive retroperitoneal hematoma. Arteriography showed the rupture of an ovarian artery aneurysm that was successfully embolized using microcoils.
American Journal of Obstetrics and Gynecology, 2014
American Journal of Medical Genetics, 2004
Microelectronics and Reliability, 2004
ABSTRACT
Proceedings of the 12th International Symposium on the Physical and Failure Analysis of Integrated Circuits, 2005. IPFA 2005., 2005
Our case study has shown the efficiency of isolating failing sites (shorts, opens) in IC packages... more Our case study has shown the efficiency of isolating failing sites (shorts, opens) in IC packages using TDR and especially sequential comparative TDR analysis, which allowed to overcome some of TDR hardware limitations and to identify the different regions of the DUT. Currently, it's possible to increase the bandwidth of the main standard TDR sources available on the market up
IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society, 2011
The scanning acoustic microscopy (SAM) is widely used today by the manufacturers and researchers ... more The scanning acoustic microscopy (SAM) is widely used today by the manufacturers and researchers in failure analysis labs to improve the microelectronic devices reliability. The goal is to detect and locate flaws inside chips using non destructive test (NDT). New packaging technologies improve the number of layers in a single package using advancing formats including for example flip chip, ball grid array and thereby increasing the number of interfaces to study. This paper deals with the automatic detection of small flaws in the z-axis to reduce time of experiment and facilitate the localization of the flaws especially in solder bump joints and underfill.
Microwave and Optical Technology Letters, 2010
ABSTRACT
2009 IEEE Radio Frequency Integrated Circuits Symposium, 2009
In this paper electromagnetic (EM) based segmentation methodology is proposed for design, analysi... more In this paper electromagnetic (EM) based segmentation methodology is proposed for design, analysis and simulation of inductive couplings in RFICs. The efficiency of the proposed methodology is demonstrated through its application to NXP-Semiconductors component and function-block test-carriers. The obtained simulation results are successfully correlated to measurement results and other relevant methods and techniques. Different segmentation strategies are compared to draw
Advanced Materials Research, 2013
81st ARFTG Microwave Measurement Conference, 2013
Ultrasound in Obstetrics and Gynecology, 2005
Objectives This study compared the accuracy of ultrasound cervical assessment (cervical length an... more Objectives This study compared the accuracy of ultrasound cervical assessment (cervical length and cervical index) and digital examination (Bishop score and cervical score) in the prediction of spontaneous birth before 34 weeks in twin pregnancies.
Ultrasound in Obstetrics and Gynecology, 2003
unknown. Our goal is to conduct a randomized clinical trial (RCT) on expectant management vs. las... more unknown. Our goal is to conduct a randomized clinical trial (RCT) on expectant management vs. laser therapy in patients with previable SIUGR and absent or reverse end-diastolic velocity in the umbilical artery (AREDV). Methods: Selection criteria: gestational age 16-26 weeks, monochorionic/diamniotic, absence of congenital anomalies, estimated fetal weight of SIUGR fetus < 10th percentile, AREDV. Patients will be randomized to either the expectant management (group I) or selective laser therapy (group II). Outcome measures will include neonatal survival and neurological morbidity. Preliminary results: Thirty-eight patients in our registry form the basis for the trial: 17 in group I, and 21 in group II. Neither survival rates for at least one fetus (14/17 or 82.3% vs. 18/21 or 85.7%, p = 0.7), nor neurological handicap in surviving fetuses (3/22 or 13.6% vs. 0/20, p = 0.08) were significantly different between groups I and II, respectively. Conclusions: An RCT comparing expectant management vs. laser therapy for the management of patients with SIUGR is indicated.
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2007
ABSTRACT Scanning capacitance microscopy (SCM) is a doping profile extraction using a nanometric ... more ABSTRACT Scanning capacitance microscopy (SCM) is a doping profile extraction using a nanometric probe as a gate of a metal-oxide-semiconductor (MOS) structure and measuring the differential capacitance. Thanks to the complete MOS equations, the authors propose in this article a description of the differential capacitance calculation. This analytic presentation is based on the solution of the Poisson-Boltzmann equation in the unidimensional mode in silicon and a decomposition of the probe in elementary rings giving capacitance from the surface probe and silicon. As [dC(Vg)/dVg]α(dΨs/dVg) , this presentation yields to the importance of the surface band bending Ψs at the oxide-semiconductor interface. The dC(Vg)/dVg calculation shows that the contact of the probe with the sample has its main contribution over a few nanometers. Results are discussed to obtain a calibration of a SCM probe available in a large range of doping and voltage and to assess the dC(Vg)/dVg signal after erosion of the probe by successive scans.
Fertility and Sterility, 2014
The relationship between ovarian cysts and infertility is a subject of debate, mainly because it ... more The relationship between ovarian cysts and infertility is a subject of debate, mainly because it is difficult to determine the real impact of the cyst and its treatment on later fertility. For a long time it was hoped that surgical treatment could prevent potential complications (such as rupture or malignancy). For presumed benign ovarian tumors, fertility sparing should be the main concern. The goal of this survey of current knowledge on the subject is to thoroughly explore the potential relationship between cysts, their treatment, and infertility. Our study is based on a review of the literature dealing with the epidemiology of ovarian cysts and the effects of their surgical management in relation to infertility. Analysis of the epidemiologic data, drawn mainly from comparative studies and cohorts, shows that the role of cysts in infertility is controversial and that the effects of surgical treatment are often more harmful than the cyst itself to the ovarian reserve. Surgery does not seem to improve pregnancy rates. When a surgical option is nonetheless chosen, a conservative laparoscopic approach is more suitable. Besides excision, sclerotherapy and plasma vaporization are promising, offering a greater preservation of the ovarian parenchyma, especially in endometriomas. These techniques must be better defined. The context of the infertility is essential, and surgeons and specialists in reproductive medicine should decide management jointly.
Clinical Nutrition, 2009
Background & aims: Infants born with severe IUGR are exposed to higher neonatal mortality and mor... more Background & aims: Infants born with severe IUGR are exposed to higher neonatal mortality and morbidity rates, as compared with appropriate-for-gestational-age. They are exposed to a higher risk of developing chronic disease such as hypertension, coronary artery disease, obesity, and type 2 diabetes in adulthood. L-Arginine is a precursor of nitric oxide (NO) and may play a role in placental vascular mediation or local vasodilatation.
Australian and New Zealand Journal of Obstetrics and Gynaecology, 2009
Conclusions: Pre-eclampsia per se does not influence heart function in IUGR fetuses.
American Journal of Obstetrics and Gynecology, 2002
Our aim was to determine the accuracy of cervical length and funneling of the internal os in the ... more Our aim was to determine the accuracy of cervical length and funneling of the internal os in the prediction of the spontaneous very preterm birth of twin pregnancies. STUDY DESIGN: In a prospective study at 13 centers, routine transvaginal ultrasound scanning was used to examine 251 women with twin pregnancies at 22 weeks of gestation and 215 women at 27 weeks of gestation; cervical length, spontaneous cervical funneling, and funneling after transfundal pressure were evaluated. Receiver operating characteristic curve analysis was used to determine the best cervical length for the prediction of spontaneous preterm birth before 32 and 35 weeks of gestation. We calculated the sensitivity, specificity, and predictive values for cervical length and for funneling. RESULTS: The median gestational age at delivery was 36 weeks in both populations. Of the population that was included at 22 weeks of gestation, 5.2% (13 women) gave birth spontaneously before 32 weeks of gestation, and 13.2% (33 women) gave birth spontaneously before 35 weeks of gestation; the median cervical length was 40 mm. The receiver operating characteristic curve showed no clear best cutoff point for cervical length. For spontaneous delivery before 32 and 35 weeks of gestation, the sensitivity of cervical length ≤30 mm was 46% and 27%, respectively; the specificity was 89% and 90%, respectively. The sensitivity of funneling was 54% and 33%, and its specificity 89% and 91%, respectively. After multivariate analysis, only funneling remained significant for delivery before both 32 and 35 weeks of gestation. Of the population that was included at 27 weeks, 3.3% (7 women) gave birth spontaneously before 32 weeks of gestation, and 12.4% (26 women) gave birth spontaneously before 35 weeks of gestation; the median cervical length was 35 mm. The receiver operating characteristic curve showed 25 mm to be the best cutoff point for cervical length. For spontaneous delivery before 32 and 35 weeks of gestation, the sensitivity of cervical length ≤25 mm was 100% and 54%, respectively, and the specificity was 84% and 87%, respectively. The sensitivity of funneling was 86% and 54%, and the specificity 78% and 82%, respectively. After multivariate analysis, both indicators remained significant for delivery before 35 weeks of gestation. Funneling after transfundal pressure at 22 or 27 weeks did not predict very preterm delivery. CONCLUSION: Cervical length and funneling both predict the very preterm birth of twins. Although cervical length is the predictor of choice at 27 weeks of gestation, at 22 weeks of gestation the diagnostic values of both parameters are close. (Am J Obstet
American Journal of Obstetrics and Gynecology, 2008
We report a case of spontaneous rupture of an ovarian artery aneurysm, 5 days after delivery. Sev... more We report a case of spontaneous rupture of an ovarian artery aneurysm, 5 days after delivery. Severe abdominal pain justified a computed tomography scan, which revealed a massive retroperitoneal hematoma. Arteriography showed the rupture of an ovarian artery aneurysm that was successfully embolized using microcoils.
American Journal of Obstetrics and Gynecology, 2014
American Journal of Medical Genetics, 2004