Abstract: Apparatus for vapour phase growing of crystals having a single multi-zone heater arranged to heat a heated zone to give a predetermined temperature profile along the length of the heated zone. A generally U-shaped tube having a first limb, a second limb, and a linkage connecting the first and second limbs is located on the heated zone. The first limb contains a source material. The second limb supports a seed such that the source material and seed are spaced longitudinally within the heated zone to provide a predetermined temperature differential between the source and seed. The crystal is grown on the seed.

Abstract: A semiconductor device structure comprising a first bulk crystal semiconductor material and a second bulk crystal semiconductor material provided on a surface of the first bulk crystal semiconductor material with or without a deliberate intermediate region, the second bulk crystal semiconductor material being a Group II-VI material dissimilar to the first bulk crystal semiconductor material, wherein portions of the first and/or second bulk crystal semiconductor material have been selectively removed to produce a patterned area of reduced thickness of the first and/or second bulk crystal semiconductor and preferably to expose a patterned area of the said surface of the first and/or second bulk crystal semiconductor material.

Abstract: An apparatus and method for obtaining an image of an object. The apparatus comprises a radiation source and a series of two to five linear detectors spaced therefrom to define a scanning zone; means to cause an object to move relative to and through the scanning zone; a direct image generation apparatus to generate an image from the output of a linear detector; an intermediate image generation apparatus configured to generate at least one intermediate image from an adjacent pair of linear detectors, by processing the output of the pair of detectors and generating an image representative of an output intermediate between the two said detector outputs; the image apparatus adapted such that at least five and preferably at least six images are generated in total; an image display adapted successively to display such images and thus display the monocular movement parallax between the images.