公开(公告)号：US3842217A

公开(公告)日：1974-10-15

申请号：US31833472

申请日：1972-12-26

Applicant: RCA CORP

Inventor： CLEMENS JOHN KAUFMANN

IPC: G11B9/00 ,  H04N5/76 ,  G11B11/12

CPC classification number: H04N5/7605 ,  G11B9/00 ,  H04N5/903

Abstract: An information record employs a storage medium comprising a metallized base material having a dielectric coating thereon. The dimensions of an information track contained in a groove in the storage medium vary in accordance with recorded information. The capacitance between an electrode in a pickup tracking in said groove and the metallized surface of the storage medium varies in accordance with the modulated information track as the pickup device scans the recording medium. Circuitry responding to said capacitance variations provides an output signal corresponding to the information recorded. One application of such a system is to record, on both sides of a disc, video information which can be reproduced in form of a video display. Recording apparatus utilizes a scanning electron microscope to bombard successive resist-coated groove bottom regions of a recording master disc with an electron beam, controlled in intensity in accordance with signals being recorded. A stamping disc, derived from the developed recording master disc, is used to impress a replica disc of thermoplastic material (e.g., vinyl). Replica disc is coated with a conductive material (e.g., aluminum), and a layer of dielectric material is deposited over the conductive coating.

Abstract translation: 信息记录采用包括其上具有介电涂层的金属化基材的存储介质。 包含在存储介质中的凹槽中的信息轨道的尺寸根据记录的信息而变化。 随着拾取装置扫描记录介质，所述凹槽中跟踪的拾取器中的电极与存储介质的金属化表面之间的电容根据调制的信息轨迹而变化。 响应于所述电容变化的电路提供对应于记录的信息的输出信号。 这种系统的一个应用是在盘的两侧记录可以以视频显示的形式再现的视频信息。 记录装置利用扫描电子显微镜用电子束轰击具有电子束的记录母盘的连续的抗蚀剂涂覆的凹槽底部区域，根据正被记录的信号强度控制。 来自显影记录母盘的冲压盘用于压印热塑性材料（例如乙烯基）的复制盘。 复制盘被涂覆有导电材料（例如铝），并且一层电介质材料沉积在导电涂层上。