A method for producing silicon substrates includes growing the silicon crystal body at a relatively high rate of growth. It has been found that the growth rate of the silicon crystal body exerts substantial influence upon generation of crystal defects in the silicon crystal body or silicon substrate. Furthermore, the oxygen concentration in the silicon crystal body or the silicon substrate is sign...

PURPOSE:To efficiently obtain a dry product having a high product value, by primarily drying a wet material by a drying apparatus having stirring function and subsequently secondarily drying the same by a drying apparatus having no stirring mechanism. CONSTITUTION:Hot air 3 generated from a heat source 2 is indirectly contacted with a heating medium 4 in a heat exchanger 5 to be heat-exchanged whi...

PURPOSE:To improve the resistance of a high purity austenitic stainless steel to intergranular corrosion cracking by adding a prescribed percentage of Mo as a stabilizing element to the stainless steel so as to prevent the diffusion of Cr to the grain boundaries. CONSTITUTION:This austenitic iron alloy consists of, by weight, <=0.02% C, 9-11% Ni, 18-20% Cr, <=2% Mn, <=0.005% P, <=0.004% S, <=0.03%...

A porous polypropylene hollow fiber membrane of a circular cross section 150 to 300 mu m in inside diameter and 10 to 150 mu m in wall thickness for use in an artificial lung, which hollow fiber membrane is characterized by having an inner surface aperture ratio in the range of 10 to 30%, a porosity in the range of 10 to 60%, and an oxygen flux in the range of 100 to 1,000 liters/min.m2.atm. and...

1. A distributor strip with wire guide elements (3) and function elements (4) supported in a trough-like, metallic, earthed receptacle (1) alternately arranged in layers, where the function elements (4) are equipped with components possessing clamping elements (11, 12, 15, 16) and contact elements, which respectively form a separating or switching contact so as to be adjacent to one another for in...

A cleaning device has a main brush which picks up dirt from a surface to be cleaned and deposits it in dirt-collecting receptacles as the cleaning device is moved over the surface to be cleaned. A pair of additional brushes is mounted in corner regions of the housing and delivers dirt toward the main brush. The additional brushes are rotated as the cleaning device is moved over the surface in oppo...