A uniform thickness flex circuit is taught that uses more than one dielectric layer. A first dielectric layer is more flexible and capable of reliably bending at a radius of curvature at which a second dielectric layer cannot be reliably bent. The second dielectric layer has at least one more desirable electrical characteristic than the first dielectric area, for example leakage. Use of the uniform thickness flex circuit to protect sensitive material in an electronic enclosure is also described.

A uniform thickness flex circuit is taught that uses more than one dielectric layer. A first dielectric layer is more flexible and capable of reliably bending at a radius of curvature at which a second dielectric layer cannot be reliably bent. The second dielectric layer has at least one more desirable electrical characteristic than the first dielectric area, for example leakage. Use of the uniform thickness flex circuit to protect sensitive material in an electronic enclosure is also described.

An insulated metal substrate (IMS) and a method for manufacturing the same are disclosed. The IMS includes an electrically conductive line pattern layer, an encapsulation layer, a first adhesive layer, a second adhesive layer, and a heat sink element. The encapsulation layer fills a gap between a plurality of electrically conductive lines of the electrically conductive line pattern layer. An upper surface of the encapsulation layer is flush with an upper surface of the electrically conductive line pattern layer. The first and second adhesive layer are disposed between the electrically conductive line pattern layer and the heat sink element. A bonding strength between the first adhesive layer and the second adhesive layer is greater than 80 kg/cm.sup.2.

A multi-layered board includes: a middle conductive layer; a first dielectric layer that is disposed directly on a first surface of the middle conductive layer; a second dielectric layer that is disposed directly on a second surface of the middle conductive layer; a first outer surface conductive layer that is disposed directly on an outer side of the first dielectric layer; and a second outer surface conductive layer that is disposed directly on an outer side of the second dielectric layer. The first outer surface conductive layer serves as a first outer surface of the multi-layered board, and the second outer surface conductive layer serves as a second outer surface of the multi-layered board. The middle conductive layer is solidly formed over an entire planar direction of the multi-layered board. The first dielectric layer and the second dielectric layer each independently have a thickness variation of 15% or less.

A wiring circuit board includes a support metal layer having thermal conductivity of 5 W/m.Math.K or more, an insulating layer disposed on at least one side in a thickness direction of the support metal layer, a wiring layer disposed on a front surface of the insulating layer, a protective metal film disposed on the entire surface of the support metal layer between the support metal layer and the insulating layer, and a protective thin film disposed on an exposed surface exposed from the protective metal film in the support metal layer.

A wiring circuit board includes a support metal layer having thermal conductivity of 5 W/m.Math.K or more, an insulating layer disposed on at least one side in a thickness direction of the support metal layer, a wiring layer disposed on a front surface of the insulating layer, a protective metal film disposed on the entire surface of the support metal layer between the support metal layer and the insulating layer, and a protective thin film disposed on an exposed surface exposed from the protective metal film in the support metal layer.

An insulated metal substrate (IMS) includes a metal substrate, an insulating layer, a plastic frame, and a plurality of conductive metal pads. The insulating layer is located on the metal substrate. The plastic frame is located on the insulating layer and has a plurality of aperture areas. The conductive metal pads are located on the insulating layer and are respectively located in the aperture areas, and the conductive metal pads have sidewalls are in contact with the plastic frame.

In one or more embodiments, a method of manufacturing a high impedance surface (HIS) apparatus comprises patterning a first conducting layer on a core to form a first set of conducting pads, and patterning a second conducting layer on the core to form a second set of conducting pads. The method further comprises applying solder paste to each of the conducting pads of the second set of conducting pads. Also, the method comprises placing chip capacitors on the solder paste on the second set of conducting pads. In addition, the method comprises applying underfill between the chip capacitors. Also, the method comprises applying solder paste to each of the conducting pads of the first set of conducting pads. In addition, the method comprises placing chip inductors on the solder paste on the first set of conducting pads. Further, the method comprises applying underfill between the chip inductors.

In one or more embodiments, a method of manufacturing a high impedance surface (HIS) apparatus comprises patterning a first conducting layer on a core to form a first set of conducting pads, and patterning a second conducting layer on the core to form a second set of conducting pads. The method further comprises applying solder paste to each of the conducting pads of the second set of conducting pads. Also, the method comprises placing chip capacitors on the solder paste on the second set of conducting pads. In addition, the method comprises applying underfill between the chip capacitors. Also, the method comprises applying solder paste to each of the conducting pads of the first set of conducting pads. In addition, the method comprises placing chip inductors on the solder paste on the first set of conducting pads. Further, the method comprises applying underfill between the chip inductors.

The present disclosure provides a printed circuit board and a manufacturing method of the printed circuit board. The manufacturing method may include: at least two core plates may be provided; a composite anti-glue film assembly may be arranged at a preset position of one of the at least two core plates, the composite anti-glue film assembly may include a first anti-glue film layer, a second anti-glue film layer and a bonding layer. The first anti-glue film layer may contact the preset position. The first anti-glue film layer may be a polyimide layer. The bonding layer may be configured to bond the first anti-glue film layer and the second anti-glue film layer together to produce the composite anti-glue film assembly. Two adjacent core plates may be connected through a media layer. The core plates may be cut-out and form the printed circuit board.