摘要:
A method of gettering unintentional mobile impurities starts with production of an damaged portion on the reverse side of a silicon wafer, and the silicon wafer is placed in a high temperature vacuum ambience so that the unintentional mobile impurities are firstly trapped by the damaged portion and, then, evacuated to the high temperature vacuum ambience.
摘要:
A data processor includes a data unscrambling unit. The unit includes a memory circuit for storing data supplied thereto in a scrambled form, the data stored in the memory circuit being thereafter read out therefrom in an order which is to be the unscrambled form. The memory circuit includes a memory cell array, a set of first terminals supplied with a write address having a value which is changed one by one, a data write control circuit for writing data into the memory cell array in a first order in accordance with changes in value of the write address. A set of second terminals is supplied with a read address having a value which is changed one by one. A data read control circuit reads out data from the memory cell array in a second order that is different from the first order, the read out being in accordance with a change in value of the read address.
摘要:
A camera with a taking lens system changeable in focal length between a relatively long and a relatively short focal length, which has an exposure control meter comprising a masking member disposed in front of a photoelectric element to provide an electric exposure control output, and formed with first and second openings for allowing light that has passed therethrough to fall on the photoelectric element at different incident angles. A light stop member is movable to cover or uncover the second openings upon changing the taking lens system between the relatively long and relatively short focal lengths. Upon changing the taking lens system to the relatively short focal length, the light stop member is moved to uncover all of the first and second openings so as to increase the quantity of light falling on the photoelectric element and to permit that light to fall at an increased incident angle; and, on the other hand, upon shifting the taking lens system to the relatively long focal length, the light stop member is moved back so as to cover only the second opening means while uncovering the first openings, thereby to decrease the quantity of light falling on the photoelectric element and to permit that light to fall only at a decreased incident angle.
摘要:
The start of the leading curtain or the trailing curtain of a focal plane shutter is controlled to obtain an accurate exposure time. A delay means is provided in the mechanism for releasing the leading curtain or in the mechanism for releasing the trailing curtain. The difference between the delay time of the start of the leading curtain and the delay time of the start of the trailing curtain is controlled to be equal to the constant time during which the leading curtain runs overlapping with the trailing curtain. In one embodiment, an inertia member is provided in the vicinity of the curtain release member to delay the movement of the curtain release member. In another embodiment, an electric delay circuit is provided to delay the start of the trailing curtain. In both embodiments, the time of delay of the start of the curtain can be controlled.