摘要:
An apparatus is provided for forming a seal around the opposite edges of a resist covered web which passes through a spray etchant chamber where etchant is sprayed on one side of the web while the opposite side of the web is protected from etchant spray and fumes by an edge sealing apparatus that utilizes an inflatable air bag to maintain a constant sealing force along the edges of the web.
摘要:
A shadow mask for colored TV picture tubes contains the conventional foraminous or translucent area formed by multiple vertical rows of miniature apertures or slits with the improvement being a set of parallel elongated channels or grooves which are located between the vertical rows of slits or apertures to produce a self-supporting mask which has a smoothly curved surface.
摘要:
A reusable sandwich type matrix for the formation of fine mesh comprising a base plate, a photoresist defining the mesh pattern, and a silica coating encapsulating the top of the base plate and the photoresist.
摘要:
A process for the etching of polyimide films which includes applying a photo sensitive resist of a predetermined viscosity and utilizing hydrazine as an etchant to remove unwanted sections of the polyimide film after exposing and developing the light sensitive resist.