Abstract: An apparatus for the formation of a visual sense effect comprises a first object A having a plurality of windows disposed around an axis of rotation C and a second object B so disposed as to show part thereof through the windows W of the first object A, with the first object A and the second object B adapted to be rotated relative to each other round the axis of rotation C. By virtue of the visual sense effect in vision, this apparatus allows an object of a polygonal shape to be perceived as though the object were repeating enlargement, contraction, deformation, and eccentric movement.

Abstract: An apparatus for the formation of a visual sense effect comprises a first object A having a plurality of windows disposed around an axis of rotation C and a second object B so disposed as to show part thereof through the windows W of the first object A, with the first object A and the second object B adapted to be rotated relative to each other round the axis of rotation C. By virtue of the visual sense effect in vision, this apparatus allows an object of a polygonal shape to be perceived as though the object were repeating enlargement, contraction, deformation, and eccentric movement.

Abstract: A support boat for objects-to-be-processed including a plurality of support shelves formed in multi-stages spaced from each other by a vertical pitch for mounting a plurality of objects-to-be-processed which are to be heat treated in a vertical heat treatment apparatus; and a plurality of support bars for interconnecting the support shelves vertically spaced from each other and holding the same, the support boat comprising a light shielding plate disposed above an uppermost one or below a lowermost one of the support shelves for blocking heat rays from a heater for heating, whereby abrupt heating of central parts of those of the objects-to-be-processed which are positioned near the top or the bottom of the support boat is suppressed, and all the objects-to-be-processed can have substantially the same heat history.

Abstract: A temperature control method in a rapid heat treatment apparatus comprising simulatively heating dummy wafers in a process tube and previously detecting and grasping by temperature sensors a wafer temperature rising pattern, a heater temperature rising pattern and an internal atmosphere temperature rising pattern, arranging wafers to be processed in the process tube, detecting a temperature of each zone and that of each heater element by the temperature sensors, upon heating the wafers, and controlling each heater element on the basis of the detected temperatures and the wafer, heater and internal atmosphere temperature rising patterns by a controller to rapidly and uniformly raise the temperature of each wafer until the temperature of the wafers in each zone reaches the intended one and becomes stable.