Repotenciación y uso del Sistema Van der Pauw del laboratorio de materia condensada: diseño y construcción de un microposicionador.

Abstract

In the Curricular Integration Work (TIC), the design and construction procedure of a type of micropositioner that moves in three axes is presented to apply the Van der Pauw characterization technique in the Condensed Matter Laboratory of the Escuela Politécnica Nacional. Micropositioners are used to move objects from one point to another with great precision and are often used to cut, drill, engrave or simply place an object in a specific position. The Van der Pauw characterization equipment is located in the Condensed Matter Laboratory. This equipment had a totally manual system to place the tungsten needles on the films of the material to be characterized. Therefore, a new positioning system, the micropositioners, was built and installed, which gives us greater precision and ensures the integrity of the analyzed films. For the development of the Curricular Integration Work, three main stages were proposed, these being: research, design and construction. In the first stage, an investigation was carried out on the micropositioners (state of the art) to determine the requirements and limitations that they need to meet the proposed objectives; In the next stage, design, the different design alternatives were analyzed and the best one was chosen. In addition, the constituent elements of the micropositioner were evaluated in detail to determine the appropriate construction materials and establish parameters for its correct operation; Finally, in the construction stage, four micropositioners were built for the Van der Pauw system. In addition, the costs of manufacturing a micropositioner and the entire positioning system (four micropositioners) were presented.