|
LTCC LAB |
|
| Home |
Glossary of Terms for all Engineers, manufacturing, and others in the Electronics market, the terms are most on Electrical Testing and process of chip capacitors, multilayer ceramic capacitors, single layer ceramic capacitors and process of ceramic dielectric materials. Aging The loss of dielectric constant (see dielectric constant), by dielectric relaxation, expressed as % per decade of time. Burn-In Process of exposing the capacitors or any other device to elevated temperatures with voltage the purpose is to screening out marginal parts, eliminating potential field failures. Capacitor A device consisting of alternate layers of conductor and insulation materials (ceramics....), capable of storing a charge of electricity. Capacitance The quantity of energy stored by a capacitor (expressed in farads). Calcine Apply heat to the ceramic powder to a temperature below the sintering temperature in order to pre react certain ingredients. Casting To pour a smooth film of ceramic slurry to produce ceramic tape. Chip A sintered Monolithic, Single layer, multilayer ceramic capacitor and noble metal. Conductor, Electrical A material capable of carrying (conducting) electricity. Silver is the best electrical conductor. Copper, gold, and aluminum are also popular conductors. Curie In barium titanate dielectric, that temperature where the crystalline changing from cubic to tetragonal form, and the material becomes ferroelectrics from Para electric. and at this point the dielectric constant is max. Depressor A chemical added to a ceramic formulation to lower the dielectric constant at the curie point. Delamination Separation of layers of a sintered capacitor, resulting from air inclusion during lamination, or during fast burnout of the Binders. Dicing / cutting Separate the lamination of ceramic into smaller pieces by blade, diamond wheel, or any other cutting means. Dielectric in chips capacitors, it is the ceramic insulator that capable of high degree of polarization. A non-conductor of current, an insulator. Dielectric Constant the ratio between the absolute permittivity of a material and the absolute permittivity of vacuum. Dielectric Absorption The ratio of recovery voltage after discharging of a capacitor to the charging voltage. Expression in %, caused by the accumulation of remnant electrons on the electrodes. Dissipation Factor The power lost in a capacitor as measured by comparing the difference between power input and power output, also called tan delta or Dissipation factor (DF). Diffusion Barrier Used between metal layers and dielectric layers in order to prevent diffusion of atoms into underlying layers. Diffusion Coefficient The rate at which a diffusing will diffuse into bulk material at a given temperature; measured in cm2/sec. Electrode Conductive noble metal film. Electroplating A process for depositing metal films on a capacitor by dipping the capacitors in an electrolytic solution and permitting a current to flow through the liquid. Electrostatic discharge - ESD Transfer of charge between bodies at different electrical potentials. Etching Removing unwanted materials from the surface by chemical milling or electrolytic process Ferroelectrics A crystalline material that exhibits spontaneous dielectric polarization, hysteresis, and piezoelectric properties. Film Ceramic tape that has been cast and dried. Frit Powder glass, used in metal inks to bond the metal particles to a substrate when heated to the melting point of the glass. Green ceramic Ceramic laminate or tape before firing (sintered) Insulation Resistance Ion An atom that has either gained or lost electrons making it a charged particle (either negative or positive, respectively). LTCC ltcc - Low Temperature Cofired Ceramic. Metallization / Termination
|
@ All rights reserved LTCC LAB