摘要:
A hydrophilic, pressure-sensitive adhesive composition prepared by irradiating solid poly(N-vinyl lactam) with ionizing radiation to crosslink the poly(N-vinyl lactam) and thereafter mixing the radiation-crosslinked poly(N-vinyl lactam) with essentially unirradiated plasticizer in an amount sufficient to form a cohesive, pressure-sensitive adhesive composition. The composition is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component of a biomedical electrode. The composition is also useful as a drug delivery device to deliver pharmaceuticals or other active ingredients to or through mammalian skin. The composition is also useful as a component in a skin covering for protecting mammalian skin or mammalian skin openings with antimicrobial agents. A method of preparation of the composition is also disclosed.
摘要:
A hydrophilic, pressure-sensitive adhesive composition prepared by irradiating solid poly(N-vinyl lactam) with ionizing radiation to crosslink the poly(N-vinyl lactam) and thereafter mixing the radiation-crosslinked poly(N-vinyl lactam) with essentially unirradiated plasticizer in an amount sufficient to form a cohesive, pressure-sensitive adhesive composition. The composition is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component of a biomedical electrode. The composition is also useful as a drug delivery device to deliver pharmaceuticals or other active ingredients to or through mammalian skin. The composition is also useful as a component in a skin covering for protecting mammalian skin Or mammalian skin openings with antimicrobial agents. A method of preparation of the composition is also disclosed.
摘要:
A process of batch assembly of sundry leaded or padded devices, encapsulated and non-encapsulated, onto a printed wiring board (PWB), which exhibit significant improvements in both manufacturability and reliability. A pressure frame assembly apparatus permits an application of uniformly distributed pressures to a variety of leaded packages and padded semiconductor chips during cure of conductive adhesives (AdCons), and leads to the reduction of variations in initial interconnection resistance, and thereby to the enhancement of the reliability of AdCon interconnections. The pressures are applied to the devices by an external application of a fluid under pressure to a flexible, resiliently stretchable membrane which conformably envelops outlines of the devices and adjacent areas of the PWB. Application of vacuum suction to within the cavity, formed by the pressure frame and the membrane, prior to the external application of the fluid pressure to the membrane, further improving the reliability of surface mounted assembly of packages on the interconnection board. The external application of pressure enhances thermal conductivity needed for curing the AdCon, increases the range of processing parameters usable for this technique and reduces assembly times. Assembly yields approaching 100% were observed for a variety of surface mounted packages indicating that the system will be highly reliable.
摘要:
A hydrophilic, pressure-sensitive adhesive composition prepared by irradiating solid poly(N-vinyl lactam) with ionizing radiation to crosslink the poly(N-vinyl lactam) and thereafter mixing the radiation-crosslinked poly(N-vinyl lactam) with essentially unirradiated plasticizer in an amount sufficient to form a cohesive, pressure-sensitive adhesive composition. The composition is useful as a biomedical adhesive for transmitting or receiving electrical signals as a component of a biomedical electrode. The composition is also useful as a drug delivery device to deliver pharmaceuticals or other active ingredients to or through mammalian skin. The composition is also useful as a component in a skin covering for protecting mammalian skin or mammalian skin openings with antimicrobial agents. A method of preparation of the composition is also disclosed.
摘要:
Electrical conductive adhesive tapes comprising at least one carrier web having a low-adhesion face bearing thereon an adhesive layer having substantially uniform thickness and a Lap Shear Value from aluminum of at least 0.2 MPa, said tape being formed having a plurality of perforations, each perforation containing a plurality of electrically conductive particles in contact with the adhesive layer which is otherwise substantially free from electrically conductive material.
摘要:
Electrical connection between electrode arrangements formed on first and second substrates is described. The first substrate is placed over the second substrate with a UV light curable adhesive between them. The UV light curable adhesive carries first and second particles dispersed therein. The first and second substrates are pressed against each other and exposed to UV light in order to harden the adhesive. The first particles are made from conductive particles and preferably resilient and function to form current paths between the electrodes of the first and second substrates. The second particles function to prevent the first particles from being destroyed by excess deformation.
摘要:
A conductive connecting method for electrically connecting first and second electronic parts each having a plurality of connecting terminals arranged at a small pitch is disclosed. A conductive bonding agent is interposed between the plurality of connecting terminals of the first and second electronic parts. The conductive bonding agent is prepared by mixing a plurality of fine connecting particles in an insulating adhesive. Each fine connecting particle is designed such that a fine conductive particle or a fine insulating particle with a plating layer formed on its surface is covered with an insulating layer consisting of a material which is broken upon thermocompression bonding. When the conductive bonding agent is subjected to thermocompression bonding between the connecting terminals of the first and second electronic parts, portions of the fine connecting particles which are urged by the respective fine connecting terminals are broken. However, the insulating layers of the fine connecting particles in the planar direction are not broken and remain as they are. In this conductive connecting structure, even if the ratio of fine connecting particles is increased, and adjacent fine connecting particles are brought into contact with each other, insulating properties can be kept in the planar direction, while conduction is obtained only in the direction of thickness.
摘要:
A method of manufacturing an electrical circuit system comprising electrical conductors on a flexible film and an article of manufacture made thereby, which may be used in place of printed circuit boards and which conductors form connector means for readily connecting to the leads of one or more sides of an electronic package. The electrical conductors also form a means for selectably connecting each electrical conductor from each pin to a selected input or output conductor, comprising a first and second plurality of conductors, such as a matrix having a column of conductors and a row of conductors. The electrical circuit system may be manufactured by numerous methods such as applying a conductive ink or paint by screening, photolithography or drawn by a digital plotter on a plastic film, such as Mylar. The film may include electrical edge connection means to provide input or output to or from said conductors. All or most of the system is integral, thus forming the conductors and the in-line connector portion of the conductors in continuum, using the same conductive material, such as ink, or paint and the same dielectric material, such as ink, or paint. A dielectric covers the appropriate portion of the system.
摘要:
A composition comprising (A) an epoxy resin type adhesive, (B) particles obtained by coating a nucleus of a curing agent with a film, (C) pressure-deformable electroconductive particles having an average particles size larger than that of the particles (B), and if necessary (D) rigid particles having an average particle size smaller than that of the particles (B), is effective for connecting circuits electrically or connecting a semiconductor chip to a wiring substrate.
摘要:
Multiple-connector tape has a flexible backing carrying a pattern of longitudinally electrically conductive stripes, each having an overlying adhesive band, each edge of which precisely follows an edge of the underlying conductive stripe. The adhesive bands may contain silver particles having thicknesses exceeding that of the adhesive between particles so that the terminals of an electrical device can be electrically connected through the particles to the longitudinally conductive stripes when the tape is adhered by its adhesive to the device. Electrical connections can be made in the absence of such particles when the stripes are metal foil having embossings which protrude through the adhesive.