US PATENT SUBCLASS 349 / 138
.~.~.~ Insulating layer

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

56  DF  PARTICULAR STRUCTURE {7}
84  DF  .~ Having significant detail of cell structure only {17}
122  DF  .~.~ Particular nonoptical film or layer (e.g., adhesive layer, barrier layer) {3}
138.~.~.~ Insulating layer

DEFINITION

Classification: 349/138

Insulating layer:

(under subclass 122) Subject matter wherein a particular nonelectrically conducting layer is in the vicinity of the liquid crystal material.

(1) Note. When the insulative layer is located between an electrode and the liquid crystal material, this insulative layer causes the device to block direct current, thereby extending device life.

(2) Note. Although alignment layers are typically insulative layers adjacent the liquid crystal material, they are excluded from this subclass unless an insulating function is specifically recited for the layers. For such excluded subject matter, see SEARCH THIS CLASS, SUBCLASS below.

(3) Note. Excluded from here are insulative layers which are soley within the structure of switching elements. For such excluded subject matter, see SEARCH THIS CLASS, SUBCLASS below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

43, and 52, for the use of insulative layer in a structure of a transistor or in a MIM switching device respectively.

123, and 136, for the use of alignment layer in a liquid crystal device.