The use of arc-erosion as a patterning technique for transparent conductive materials

Within the framework of cost-effective patterning processes a novel technique that saves photolithographic processing steps, easily scalable to wide area production, is proposed. It consists of a tip-probe, which is biased with respect to a conductive substrate and slides on it, keeping contact with the material. The sliding tip leaves an insulating path (which currently is as narrow as 30 μm) across the material, which enables the drawing of tracks and pads electrically insulated from the surroundings. This ablation method, called arc-erosion, requires an experimental set up that had to be customized for this purpose and is described. Upon instrumental monitoring, a brief proposal of the physics below this process is also presented. As a result an optimal control of the patterning process has been acquired. The system has been used on different substrates, including indium tin oxide either on glass or on polyethylene terephtalate, as well as alloys like Au/Cr, and Al. The influence of conditions such as tip speed and applied voltage is discussed

Geodetic works carried out in the Strait of Gibraltar

The proximity between Europe and Africa and the fact that the Strait of Gibraltar has historically acted as a link between races, cultures and religions have made absolutely necessary to establish a relationship between the Northern African coast and the Southern European equivalent. From the Nineteenth Century the possibility of building a permanent link between both continents through the Strait of Gibraltar has been taken into account. In order to establish that relationship it is necessary to have coastal zones completely geo-referenced, under the same geodetic system and with a unique projection system. The paper describes the work carried out in the Strait of Gibraltar for this purpose.

Métodos de análisis del impacto de barcos contra pilas de puentes : aplicación al puente sobre el estrecho de Gibraltar

Informe presentado a la Sociedad Española para la Comunicación del Estrecho de Gibraltar (SECEG). Se describe en este informe la problemática estructural que aparece en el análisis del impacto entre sólidos deformables con especial énfasis en el caso del choque de una embarcación contra una pila de puente. Se lleva a cabo una revisión de los procedimientos de cálculo existentes, extendiendo el estudio desde los modelos mas simples de impacto entre cuerpos rígidos hasta los métodos basados en una formulación rigurosa de la mecánica de los medios continuos. Se comentan los programas de computador existentes para resolver estas situaciones de impacto y las técnicas que permiten considerar la influencia de las fuerzas hidrodinámicas en el choque. Por último se expone una metodología tentativa de diseño y cálculo de las defensas de las pilas ante la acción del choque de una embarcación.

The moorish baths at Gibraltar

The moorish baths at Gibraltar

Gibraltar, llave y guarda del reino de España

Gibraltar, llave y guarda de España

¿Por qué tuvo Molly que vivir en Gibraltar?

¿Por qué tuvo Molly que vivir en Gibraltar?

Sobre la obra de Juan Daniel Fullaondo ¿Por qué tuvo Molly que vivir en Gibraltar?

Sobre la obra de Juan Daniel Fullaondo ¿Por qué tuvo Molly que vivir en Gibraltar?