H01G7/021 - CPC Classification Index

ClassID:

201970 ⎘

H01G7/021 - CPC Classification

Classification description:

Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture; Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric

Sub-classes:

H01G7/023 » {of macromolecular compounds} 40

Recent Application in this class:

20240304700

2024-09-12

DEEP TRENCH CAPACITOR INCLUDING A COMPACT CONTACT REGION AND METHODS OF FORMING THE SAME

20230069774

2023-03-02

Deep trench capacitor including a compact contact region and methods of forming the same

20210111644

2021-04-15

Element and method for manufacturing element

20180236384

2018-08-23

Electret-containing filter media

20180053603

2018-02-22

Tunable shape memory capacitor and a method of preparation thereof

20170133077

2017-05-11

Electroentropic memory device

20160233089

2016-08-11

Lift printing of multi-composition material structures

20130202810

2013-08-08

Process for producing charge retention medium

20110254384

2011-10-20

Method and apparatus for electric

#10

20110234043

2011-09-29

Flexible dielectric variable capacitance system

#11

20110095626

2011-04-28

Hybrid Electret

#12

20110031845

2011-02-10

Electret and electrostatic induction conversion device

#13

20100263696

2010-10-21

Method and apparatus for electric treatment of substrates

#14

20100127595

2010-05-27

Electret and electrostatic induction conversion device comprising the same

#15

20090272269

2009-11-05

Method and apparatus for electric treatment of substrates

#16

20070230722

2007-10-04

Condenser microphone

#17

20060254419

2006-11-16

Method and apparatus for electric treatment of substrates