IPC Definitions - January 01, 2012

H01G - Definition fr

Definition statement

This subclass covers:

Non-electrolytic, fixed and variable capacitors per se, details thereof, and structural combinations thereof with each other, with electrolytic devices covered by this subclass, or with other electric elements not covered by this subclass where the structure consists mainly of a capacitor.

Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices per se, details thereof, and structural combinations thereof with each other, with non-electrolytic capacitors or with other electric components not covered by this subclass.

Details common to two or more main types of devices covered by this subclass.

Processes and apparatus for manufacturing the capacitors, rectifiers, detectors, switching devices and light-sensitive or temperature-sensitive devices covered by this subclass.

References relevant to classification in this subclass

This subclass does not cover:

Selection of specified materials as dielectric

H01B 3/00

Capacitors with potential-jump or surface barrier

H01L 29/00, H01L 51/05
Examples of places where the subject matter of this class is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Indicating or measuring liquid level, or level of fluent solid material by measuring variations of capacity of capacitors

G01F 23/26

Measuring temperature using capacitive elements

G01K 7/34

Thin- or thick-film circuits; Capacitors as a component of an integrated circuit, e.g. stacked capacitors in DRAM's

H01L 27/00

Impedance networks utilizing capacitors

H03H

Printed circuits incorporating printed capacitors

H05K 1/16

Informative references

Attention is drawn to the following places, which may be of interest for search:

Powder metallurgy

B22F

Layered products

B32B

Compositions of ceramic materials

C04B 35/00

Polymeric films or sheets

C08J 5/18

Electrolytic coating by surface reaction, i.e. forming conversion layers

C25D 11/00-C25D 11/38

Measuring force or stress by measuring variations in capacitance

G01L 1/14

Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by making use of variations in capacitance

G01L 9/12

Investigating or analyzing material by investigating capacitance

G01N 27/22

Measuring capacitance; Measuring dielectric constants

G01R 27/26

Batteries and fuel cells

H01M

Synonyms and Keywords

In patent documents the following words "condenser" and "capacitor" are often used as synonyms.

In patent documents the following expressions/words: "supercapacitor", "ultracapacitor", and "electrochemical capacitor" are often used as synonyms for "double-layer capacitor", which is used in the classification scheme of this subclass.