A bearing structure for a high-low-voltage conversion circuit is disclosed and includes an insulation carrier, a first conductor layer, a second conductor layer, a first trench and a first insulation material. The first conductor layer and the second conductor layer are coated on the first surface and the second surface of the insulation carrier, respectively. A voltage difference is formed between the first conductor layer and the second conductor layer. The first trench is disposed on the first surface and surrounds an outer peripheral edge of the first conductor layer. The first conductor layer is extended from the first surface into the first trench, and the outer peripheral edge of the first conductor layer is located at a bottom of the first trench. The first insulation material covers the outer peripheral edge of the first conductor layer and is filled in the first trench.

A colored thin covering film is provided, including an upper detached layer, a colored ink film, a low dielectric glue layer, and a lower detached layer. The color ink layer is formed between the upper detached layer and the low dielectric glue layer. The low dielectric glue layer is formed between the colored ink layer and the lower detached layer. The thickness of the colored ink layer is between 1 to 10 m, and the thickness of the low dielectric glue layer is between 3 to 25 m, such that a total thickness of the colored ink layer and the low dielectric glue layer is allowed to be between 4 to 35 m. The colored thin covering film has an extremely low dielectric constant and loss, extremely low ion migration, good adhesion, heat dissipation, high flexibility, and low resilience, and can be processed in a low temperature.

A circuit board including a substrate, a patterned circuit layer and a photo-imaginable dielectric layer is provided. The substrate has a first surface and a second surface opposite to each other. The patterned circuit layer is disposed on the first surface, and a line width of the patterned circuit layer gradually reduces from the first surface towards the second surface. The photo-imaginable dielectric layer is disposed in the substrate corresponding to the patterned circuit layer. In addition, a manufacturing method of the circuit board is also proposed.

A printed wiring board includes a first conductor layer including a first conductor circuit and a second conductor circuit formed adjacent to the first circuit, a resin insulating layer formed on the first conductor layer such that the insulating layer is filling space between the first and second conductor circuits, and a second conductor layer formed on the insulating layer such that distance (T) between the first and second conductor layers is in the range of 4.5 m to 10.5 m. The resin insulating layer includes inorganic particles having average particle diameter (D1) such that ratio (D1/S) of the diameter (D1) to distance (S) of the space is less than 0.25 and that ratio (D1/T) of the diameter (D1) to the distance (T) is less than 0.25, where the distance (S) of the space between the first and second conductor circuits is in the range of 4.5 m to 10.5.

Presented is a residual ionic contamination measurement device. The device comprises a component body defining at least one surface, and conductive traces along at least one surface of the component body defining at least one connection configured to connect the conductive traces by at least one of direct and indirect means to an electrical parameter measurement device, the conductive traces configured to remain in a passive state until connected to the electrical parameter measurement device, wherein when the conductive traces are connected to the electrical parameter measurement device, a signal is generated indicative of a level of residual ionic contamination.

A circuit board including a substrate, a patterned circuit layer and a photo-imaginable dielectric layer is provided. The substrate has a first surface and a second surface opposite to each other. The patterned circuit layer is disposed on the first surface, and a line width of the patterned circuit layer gradually reduces from the first surface towards the second surface. The photo-imaginable dielectric layer is disposed in the substrate corresponding to the patterned circuit layer. In addition, a manufacturing method of the circuit board is also proposed.

A power semiconductor module includes a module housing having a top side, a first terminal group, and a second terminal group. A circuit board, which has a first electrode and a second electrode, is mountable on the power semiconductor module in such a way that in the mounted state each terminal of the first group is electrically conductively connected to the first electrode and each terminal of the second group is electrically conductively connected to the second electrode. A first isolation web and/or a second isolation web is provided. Each isolation web is fixed to the circuit board even in the unmounted state, and arranged between the first terminal group and the second terminal group in the mounted state.

The invention relates to an arrangement for increasing the insulation coordination between at least two electric potentials on a printed circuit board (2), said arrangement comprising the printed circuit board (2) and an insulation barrier (3), wherein the printed circuit board (2) has an opening (7) between the electric potentials, and the insulation barrier (3) is disposed on the printed circuit board (2) so as to be displaceble through the opening (7) and is designed such that the isolating distance between the two electric potentials can be enlarged by displacing the insulation barrier (3) relative to the printed circuit board (2). The arrangement makes it possible obtain a high packing density on the printed circuit board (2).

A power supply device of an electronic apparatus includes: a power input portion configured to receive alternating current (AC) power; a rectifier-smoother configured to rectify and smooth the received AC power and output the AC power; a power converter configured to convert a level of a voltage output from the rectifier-smoother to supply operating power to the electronic apparatus; a board on which the power input portion, the rectifier-smoother, and the power converter are provided; and a waterproof coating layer formed in an area on the board corresponding to a position of the power converter to prevent infiltration of moisture from an outside.

A method for manufacturing a printed circuit board of a backlight module is provided. The printed circuit board includes a light bar region and a heat dissipating region. The light bar region used for mounting a light bar of the backlight module and formed with a conductive circuit for supplying power for the light bar. The heat dissipating region is connected with the light bar region. A connection location of the light bar region and the heat dissipating region is subjected to cutting to form a slot located at a side of the printed circuit board in order to prevent short-circuiting between the heat dissipating region and the conductive circuit of the light bar region. The cutting is made to partly penetrate through the thickness of a dielectric layer on which the conductive circuit is formed in order to completely separate the light bar region from the heat dissipating region.