Title:Reiterated micro contacts
Author:Videkov, Valentin HristovDate:2006Abstract:In the present report some micro contacts designs of "dry" type where processes of welding and soldering are not applied are considered. The peculiarities of mechanical contact realization for different structures are discussed. They have been divided into groups according to the plane of the devices. Photos of experimentally made structures ...Library:
TECHNICAL UNIVERSITY OF SOFIA
Title:Two-dimensional physical ac-simulation of gaas hbts
Author:Palankovski, Vassil; Hristov, Marin Hristov; Philippov, Philipp IvanovDate:2006Abstract:: In this work, results from fully two-dimensional physical device simulation of Gallium Arsenide (GaAs) heterostructure bipolar transistors (HBTs) are presented. Scattering parameters (S-parameters) are directly obtained from small-signal AC-analysis of real devices. A comparison reveals very good agreement with measured data.Library:
TECHNICAL UNIVERSITY OF SOFIA
Title:Wave soldering quality improvement by design of experiment approach
Author:Andonova, Anna Vladova; Dinkova, Nely; Marinov, IvanDate:2006Abstract:The investigation deals with quality improvement of wave soldering joints for printed circuit boards (PCB) by using DOE approach. Using DOE pro XL capabilities, DOE and statistic process control an effective way to approach and evaluate wave soldering process development is offered to determine the most essential control parameters in order ...Library:
TECHNICAL UNIVERSITY OF SOFIA
Title:Three-dimensional microfabrication of high-aspect-ratio structures using dry negative photoresist
Author:Andreev, Svetozar Krastev; Georgieva, Adriana Kirilova; Todorov, Svetlin StefanovDate:2006Abstract:The development of anisotropic, high-aspect-ratio micromachining processes has provided opportunity for the extension of silicon microfabrication capability well into the third dimension. For some applications, however, truly 3D structures are desired, especially those that possess arbitrary surface height profiles, i.e., surfaces with ...Library:
TECHNICAL UNIVERSITY OF SOFIA
Title:Production of 3D contact structures using the LIGA method
Author:Videkov, Valentin Hristov; MIhaylova, Evelina Aleksandrova; Andreev, Svetozar Krastev; Iordanov, Nikola StefanovDate:2006Abstract:The purpose of this report is finding an alternative method for 3D contact structures production, which is different from traditional silicon technology. The LIGA method showed capability of preparing such structures. For that purpose the technological sequence for LIGA process implementation in making of functional contact is investigated ...Library:
