The large physical size of capacitors and/or excessive values of associated lead inductance are two major limitations in the development of novel packaging modules, with high packaging density, high performance and reliability along with low system cost. Embedded capacitor technology in thin film form offers a promising solution to these limitations. A design space with capacitance density and breakdown voltage as performance properties, with material dielectric constant and film thickness as parameters has been explored, focusing on tantalum pentoxide (Ta 2 O 5 ) as the dielectric material. An inherent tradeoff is established between breakdown voltage and capacitance density for thin film capacitors. The validity of the proposed design space is illustrated with thin films of Ta 2 O 5 , showing deviation from the "best can achieve" breakdown voltage for films thinner than 0.4 m and films thicker than 1 m.Index Terms-Breakdown field, capacitance density, design space, embedded capacitors, tantalum pentoxide, thin films.
IntroductionSpontaneous recurrent pneumothorax during pregnancy is a rare condition. Few cases have been reported previously in the literature. There is no universal guideline for the management of this condition. Treatment options include conservative management with intercostal drain and surgical management in the form of thoracotomy or video-assisted thoracoscopy.Case presentationWe report a case of recurrent spontaneous pneumothorax in a 38-year-old Afro-Caribbean woman on her third trimester of pregnancy. The disease was managed with the insertion of an intercostal drain on three occasions, which was then followed by surgical intervention immediately after pregnancy.ConclusionThe diagnosis of pneumothorax should be considered in the differential diagnosis of pregnant women experiencing chest pain and dyspnoea. No adverse maternal or foetal outcome has been reported in well-managed cases. Management involves good coordination between the obstetric and surgical teams.
Colo-duodenal fistula is an uncommon complication of malignant and inflammatory bowel disease. Presentation varies from upper abdominal pain, feculent vomiting and diarrhea associated with foul eructation's. Occasionally patients presents with gastro-intestinal bleed. The contact of duodenal bile salts with colonic mucosa frequently leads to diarrhea, so also duodenal colonization with colonic pathogens frequently leads to malabsorption and severe foul eructations. The diagnosis is established either by gastrointestinal contrast studies or contrast enhanced C. T. Scan. Gastroduodenoscopy can demonstrate the fistulous communication or direct invasion and it can also be helpful in obtaining a histological diagnosis. Surgical treatment includes Right Radical hemicolectomy combined with Pancreatico duodenectomy in operable patients and Intestinal bypass for inoperable ones.Right Radical hemicolectomy combined with wedge excision of Duodenum is a suitable alternative in select cases. We report an unusual case of locally advanced carcinoma hepatic flexure of colon with direct invasion of duodenum. Extended right radical hemicolectomy with wedge excision of second part of duodenum was done as an alternative to combined radical hemicolectomy with Pancreatico duodenectomy.
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