Abstract:
A base material for the production of printed circuits according to the additive method includes a laminate base made up of laminated-together core sheets impregnated with hardenable resin, and a cover layer made up of a substrate sheet preimpregnated with phenolic resol resin and provided with an adhesive layer of an elastomeric polymer. The preimpregnated substrate sheet is also provided with a further resin impregnation containing a self-crosslinking copolymer of acrylic monomers and up to 30% by weight of a hardenable phenolic resol resin.
Abstract:
The insulating substrate comprises an insulating sheet made of cellulose material and a prepreg impregnated with a thermosetting resin and bonded to at least one surface of the insulating substrate. A printed circuit board is prepared by forming electric conductors arranged in a predetermined circuit pattern on the surface of the prepreg.
Abstract:
Self-extinguishing laminates are made by an improved process, wherein individual layers of a carrier material are impregnated with a thermosetting phenolic resin containing a flame-retardant agent and the impregnated layers are placed one above another and bonded together by compressing them at elevated temperature and under elevated pressure to give a hardened laminate. More specifically, finely pulverulent phosphorus pentanitride as a flame-retarding agent is dispersed in the plasticized or non-plasticized thermosetting phenolic resin, with or without a diluent; the phenolic resin, based on its solid matter content, and the phosphorus pentanitride being used in an approximate ratio by weight of 100:4 to 100:15; and the phenolic resin, based on its solid matter content, and the carrier being used in an approximate ratio by weight of 100:80 to 100:150.
Abstract:
A process for the manufacture of printed substrates and decalcomania compositions used therefor comprising a permeable backing paper, water-soluble binder, printed pattern such as hybrid or monolithic circuit, and removable cover coat, these components being laminated one upon another.
Abstract:
A transfer device comprises a base layer of paper or the like, an adhesive layer attached to said base layer directly or by means of a thin paper, a conductive pattern or circuit element pattern printed on said adhesive layer and, further, a carrier layer over said pattern. Printed wiring, integrated circuits or the like are fabricated by printing a circuit pattern on the base layer and covering same with the carrier layer, removing the base layer and mounting the circuit pattern and carrier layer on a substrate.
Abstract:
Support materials for printing electrically conductive structures by means of inkjet printing with inks which contain conductive particles lead to low resistances for the printed structures without thermal post-treatment when they contain a microporous layer with a mean pore size of less than 100 nm as an outer layer.
Abstract:
The invention concerns a method of removing encapsulating material from encapsulated particles deposited onto a substrate. According to the method, a substrate is used which is capable of facilitating said removal of encapsulating material. The particles may be nanoparticles. In particular, the substrate-facilitated removal may result in sintering of the particles. The invention provides a novel way of functionalizing electronic structures using particulate matter and for conveniently producing e.g. printed electronics devices.
Abstract:
A boron nitride fiber paper having a very small fiber diameter and exhibiting excellent heat resistance, mechanical properties and heat conductivity. The fiber paper is composed of a fiber assembly which contains boron nitride fibers having a fiber diameter of not more than 1 μm in an amount of not less than 40 wt %.
Abstract:
Planar illumination device comprise light-emitting illumination elements arranged on a carrier, containing an electrically conductive layer and an insulating 5 layer (LEDs). The light-emitting illumination elements are connected to current feed lines in the form of a conductor path. The light-emitting illumination elements are arranged as a succession of identical units on a continuous conductor path, in each case on the electrically insulating layer of the carrier. The current discharge from the light-emitting illumination elements is represented by a conductor discharging the current and by means of a connection to the electrically conductive layer of the carrier. The planar illumination device has any number of units extending in the longitudinal and transverse direction. Cutting zones, along which any units or groups of units can be separated off or separated out, are arranged between the units.
Abstract:
A functional device fabrication apparatus is provided for forming a wiring pattern or an electronic device on a substrate using paper or paper-based material by depositing solid content of a solution on the substrate. The functional device fabrication apparatus includes a jet head. The jet head jets the solution including electronic function material onto the substrate as dot patterns. The jet head includes a device for dispensing a droplet of the solution from the jet head. A drive signal applied to the device is configured to cause the droplet jetted by the device to have a specific shape before impacting a face of the substrate.