Abstract:
A polyimide film includes a polyimide, a carbon black present in a quantity between about 0.5 wt % and about 5 wt %, and a fluorine-containing polymer present in a quantity between about 15 wt % and about 40 wt %. The polyimide film can be a single-layer film or a multi-layer film, and has a low dielectric constant and low gloss.
Abstract:
The present disclosure relates, according to some embodiments, to the fabrication of a flexible circuit board, which includes forming a base layer comprising polyimide, forming a polyimide layer on the base layer, the polyimide layer having a first surface and a second surface opposite to each other, the first surface being peelably adhered in contact with the base layer, forming a metal layer on the second surface of the polyimide layer, and peeling the base layer from the polyimide layer with the metal layer remaining on the second surface of the polyimide layer.
Abstract:
A polyimide film includes a first sub-layer and a second sub-layer connected with each other. The first sub-layer contains a first polyimide, and a particulate filler of fluorine-containing polymer distributed in the first polyimide. The second sub-layer includes a second polyimide similar or identical to the first polyimide. The first polyimide is derived from a first diamine component and a first dianhydride component, the first diamine component and/or the first dianhydride component containing fluorine atoms. The second sub-layer is derived from a second diamine component and a second dianhydride component, the second diamine component and/or the second dianhydride component also containing fluorine atoms.
Abstract:
A polyimide film includes a polyimide, a carbon black present in a quantity between about 0.5 wt % and about 5 wt %, and a fluorine-containing polymer present in a quantity between about 15 wt % and about 40 wt %. The polyimide film can be a single-layer film or a multi-layer film, and has a low dielectric constant and low gloss.
Abstract:
The present disclosure relates, according to some embodiments, to a multilayered polyimide film comprising a peelable base layer, and a polyimide layer adhered in contact with the peelable base layer. A peelable base layer may be derived from a reaction comprising a diamine compound and a dianhydride compound, wherein the peelable base comprises a polyimide and a structure according to formula (I): wherein n is a number of repeating units. According to some embodiments, a quantity of silicon atoms present in a peelable base layer comprises about 1% to about 12% of a total weight of the peelable base layer.
Abstract:
The present disclosure relates, according to some embodiments, to the fabrication of a flexible circuit board, which includes forming a base layer comprising polyimide, forming a polyimide layer on the base layer, the polyimide layer having a first surface and a second surface opposite to each other, the first surface being peelably adhered in contact with the base layer, forming a metal layer on the second surface of the polyimide layer, and peeling the base layer from the polyimide layer with the metal layer remaining on the second surface of the polyimide layer.
Abstract:
A composite film for use in an LED wafer-level packaging process to facilitate adhesion of an LED wafer to a carrier and an LED wafer-level packaging process carried out with a heating process are introduced. The composite film includes a substrate including a first surface and a second surface; a heat-resisting pressure-sensing adhesive formed on the first surface of the substrate to allow the LED wafer to be adhered to the substrate; and a heat-resisting thermally-visbreaking pressure-sensing adhesive formed on the second surface of the substrate to allow the substrate to be adhered to the carrier. The heat-resisting thermally-visbreaking pressure-sensing adhesive undergoes the heating process to reduce its adhesiveness strength; thus, upon completion of the LED wafer-level packaging process, the carrier can be detached from the composite film easily.
Abstract:
A polyimide film arrangement (e.g., a polyimide film) includes a polyimide layer having a first and a second surface opposite to each other, and a base layer peelably adhered to the first surface of the polyimide layer and containing a polyimide. The polyimide layer or the base layer includes a filler having a surface energy less than about 35 dyne/cm. Moreover, the present application also describes a method of fabricating the polyimide film arrangement, and its assembly on a substrate.