bonding (redirected from direct bonding)

bonding: see insurance.

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bonding

Any of the interactions that account for the association of atoms into molecules, ions, crystals, metals, and other stable species. When atoms' nuclei and electrons interact, they tend to distribute themselves so that the total energy is lowest; if the energy of a group arrangement is lower than the sum of the components' energies, they bond. The physics and mathematics of bonding were developed as part of quantum mechanics. The number of bonds an atom can form—its valence—equals the number of electrons it contributes or receives. Covalent bonds form molecules; atoms bond to specific other atoms by sharing an electron pair between them. If the sharing is even, the molecule is not polar; if it is uneven, the molecule is an electric dipole. Ionic bonds are the extreme of uneven sharing; certain atoms give up electrons, becoming cations. Other atoms take up the electrons and become anions. All the ions are held together in a crystal by electrostatic forces. In crystalline metals, a diffuse electron sharing bonds the atoms (metallic bonding). Other types include hydrogen bonding; bonds in aromatic compounds; coordinate covalent bonds; multicentre bonds, exemplified by boranes (boron hydrides), in which more than two atoms share electron pairs; and the bonds in coordination complexes (see transition element), still poorly understood. See also van der Waals forces.

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bonding

Tying two or more devices together to function as one. See channel bonding, G.bond and ISDN.

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bonding [′bän·diŋ]

(chemistry)

The joining together of atoms to form molecules or crystalline salts.

(electricity)

The use of low-resistance material to connect electrically a chassis, metal shield cans, cable shielding braid, and other supposedly equipotential points to eliminate undesirable electrical interaction resulting from high-impedance paths between them.

(engineering)

The fastening together of two components of a device by means of adhesives, as in anchoring the copper foil of printed wiring to an insulating baseboard.

cladding

(psychology)

The formation of an emotional attachment between two people whose identities are significantly affected by their mutual interactions.

(textiles)

The joining of two fabrics, usually a face fabric and a lining fabric.

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Bonding

The act of connecting the various structural metal parts of a metal enclosure or vehicle (as in an aircraft or automobile) so that these parts form a continuous electrical unit. Bonding serves to minimize or eliminate interference, such as that caused by ignition systems. It also prevents buildup of static electricity on one part of the structure, which can, by subsequent discharge to other parts, cause static interference. Bonding is achieved by bolting the parts together in such a way as to achieve good electrical contact or by connecting them with heavy copper cables or straps.

Bonding also refers to the fastening together of two pieces by means of adhesives, as in anchoring the copper foil of printed wiring to an insulating baseboard. See Adhesive