Topic
Blisters
About: Blisters is a research topic. Over the lifetime, 980 publications have been published within this topic receiving 16229 citations.
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TL;DR: In this article, the elastic response of a thin film of photoresist deposited on a silicon wafer was studied by using a shaft-loaded blister test method developed recently, which demonstrated that under shaft loading, the thin film underwent a pure bending mode at small deformation and gradually transformed to a pure stretching mode at larger deformation.
21 citations
TL;DR: In this article, a nonlinear von Karman plate theory was used for a consistent analysis of pressurized circular, island and peninsula blisters, and the extent of yielding in delaminating copper films with a range of thicknesses and an interfacial toughness of 100 J/m2 was examined.
Abstract: Nonlinear von Karman plate theory was used for a consistent analysis of pressurized circular, island and peninsula blister specimens. The configurations that were considered ranged from linear plates to membranes. Interfacial energy release rates and fracture mode-mixes were extracted from the solutions. For a given pressure and all possible materials and delamination length to thickness (aspect, a/h) ratios, the peninsula blister provided the highest energy release rate, followed by the island and circular blisters. The extent of yielding in delaminating copper films with a range of thicknesses and an interfacial toughness of 100 J/m2 was then examined. It was found that all configurations of the circular blister suffered from large scale yielding. The stress levels in the island blister were notably lower, especially for a/h=10, where yielding only occurred over about 10 percent of the delaminating copper layer. While extensive yielding was still present in peninsula blister configurations with a/h=100 and 500, there was none for a/h=10. A scheme for extending the utility of blister specimens to higher aspect ratios was suggested and analyzed.
21 citations
TL;DR: In this paper, a finite number of generations of helium blistering on austenite steel and Cr-Ni alloy was investigated at ion energy 40 and 100 keV and at doses from 3.1018 cm−2 to 1020 cm −2.
Abstract: The helium blistering on austenite steel and Cr-Ni alloy was investigated at ion energy 40 and 100 keV and at doses from 3. 1018 cm−2 to 1020 cm−2. A finite number of blister generations depending on ion-energy is observed. The diameter of blisters decreases from generation to generation and after the last generation of blisters the increase of doses results in sputtering of the surface and in formation of porous structure of the surface. Theoretical analysis shows: (i) blisters of subsequent generations can be formed only on places where blister covers of previous generations are opened; (ii) The blister diameter decreases from one generation to the next. Hence only a finite number of blister generations can be formed on a given surface. The number of possible blister generations is estimated as a function of ion energy.
21 citations
Patent•
28 Aug 2003
TL;DR: In this paper, the blisters are detachably attached to a zipper strip on the blister sheet to prevent undesired rotation of blisters and then depressed to remove the pills from the cavities of the blister by pushing the pills through the foil sheet that covers the slots.
Abstract: A blister pack for dispensing pills that is childproof yet senior-friendly. The blister pack includes a substantially tear-resistant housing that encloses one or more blisters contained on a blister sheet and surrounded by criss-cross grain material to provide cut or tear resistance in multiple directions. In one embodiment, the cavities of the blisters are positioned such that the pills are aligned at an angle with respect to the corresponding dispensing slots on the housing in their normal position. The blisters are detachably attached to a zipper strip on the blister sheet to prevent undesired rotation of the blisters. Upon removal of the zipper strip, the blisters may be twisted until their pills are substantially aligned with their respective dispensing slot. The blisters may then be depressed to remove the pills from the cavities of the blisters by pushing the pills through the foil sheet that covers the slots. In another embodiment, the blisters must be released and slid within a channel to align the pill with the dispensing slot to be released.
21 citations
TL;DR: In this paper, the surface modification and deuterium retention after the exposure have been investigated to prove the suitability of such materials in fusion devices in a range from 708 to 843 K.
21 citations