Dynamic behavior optimization of the junctions with SIPOS layer termination
ABSTRACT In the power devices domain, one of the key problem is the edge termination improving. This work proposes an optimisation of the structures with field electrode and SIPOS layer (semi-insulating polycrystalline silicon) in order to accomplish a maximum of the breakdown voltage with a smallest area consumed. For these kinds of structures physical models and some simulations regarding the dynamic behaviour are presented.
Conference Paper: Current trends in the electrical characterization of low-k dielectrics[Show abstract] [Hide abstract]
ABSTRACT: In this paper, current trends in the electrical characterization of low-k dielectrics for advanced interconnects, are presented. Emphasis is given to the study of moisture induced degradation and to the thermal effects in embedded interconnect architectures. The experimental results prove the necessity to provide new design guidelines for sub-0.25 μm interconnectsSemiconductor Conference, 1999. CAS '99 Proceedings. 1999 International; 02/1999
Article: J. Leonard Goldner Award 2007[Show abstract] [Hide abstract]
ABSTRACT: A recent clinical study suggested that restrictive tenosynovitis of the flexor hallucis longus (FHL) may play an important causative role in hallux rigidus. The goals of this research were to assess normal function of the FHL and the effect of restricted FHL gliding on the loading of the hallux metatarsophalangeal joint (MTPJ). We hypothesized that proximal displacement of the FHL would increase the forces carried by the FHL tendon, causing increased loading of the first metatarsal and MTPJ. Dynamic simulations of the stance phase of walking were created by loading 5 non-embalmed, non-paired cadaver lower extremities (2 male, 3 female; mean age, 69; range, 56 to 75) in the Robotic Dynamic Activity Simulator (RDAS). The RDAS recreates lower leg motion and muscle activity based on kinematic and electromyographic data of healthy subjects. FHL tendon forces and excursions were measured for the entire stance phase of gait. Bone strains in the mid-shaft of the first metatarsal were recorded and used to derive the in situ forces and moments imposed on the metatarsal and the hallux MTPJ. Under force-feedback control, FHL excursion averaged 6.57 (+/-3.13) mm during gait. When the FHL was held 2-, 4-, and 6-mm proximal to the mid-point of normal excursion to simulate progressive stenosis, the forces in the FHL tendon, first metatarsal and first MTP joint were progressively, and significantly, increased (p < 0.05). These findings support the hypothesis that progressive fibrosis at the FHL myotendinous junction can cause increased loading of the hallux MTPJ, thereby leading to hallux rigidus.Foot & Ankle International 05/2008; 29(4):367-77. DOI:10.3113/FAI.2008.0367 · 1.51 Impact Factor
Article: [Hallux rigidus and its treatment].[Show abstract] [Hide abstract]
ABSTRACT: Hallux rigidus is a rather frequent, painful limitation of movements in the metatarsophalangeal joint of the great toe caused by arthrosis. A mechanical limitation of dorsal flexion due to osteophytes frequently causes a progressive plantar flexion with compensatory hypermotility in the interphalangeal joint. Therapeutic measures with technical modification of shoes and physical therapy are often insufficient and operative therapy aims at arthrodesis or remobilisation of the great toe's metatarsophalangeal joint.Therapeutische Umschau 01/1992; 48(12):832-5.