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4 results about "Weld zone" patented technology

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Weld Zone. Zone comprising the weld line and the heat-affected areas on either side of the weld line caused by the friction welding and subsequent heat-treatment processes.

Method for reducing welding hollows of LTCC substrate and metal base plate and LTCC substrate structure

ActiveCN104093271AElectrical connection printed elementsSolder pasteWeld zone

The invention discloses a method for reducing welding hollows of an LTCC substrate and a metal base plate. The method comprises the following steps: presetting criss-cross resistance welding grid lines on a metalization layer of the surface of the substrate, and then welding the LTCC substrate and the metal base plate by adopting welding paste. As the grid lines are printed on the metalization layer of the welding surface of the LTCC substrate, discharge of fluxes and gas can be increased during welding of the LTCC substrate and the metal base plate, the formation of the hollows is reduced, and the voidage is reduced. As the grid lines are printed on the metalization layer of the welding surface of the LTCC substrate, more fluxes and gas can be discharged during welding, the accumulation of fluxes and gas is prevented, the welding area is increased, and the area of the biggest hollow is reduced. The design of multi-layer substrates and high-density grounding through holes does not need to be changed, many times of printing alignment for thickening of the rectangular-block metalization layer is avoided, and the grid lines are directly printed on the large-area metalization layer of the substrate. The printing is simple, the grid lines are clear and reliable, and the discharge channel of the fluxes can be ensured.

Method for reducing welding hollows of LTCC substrate and metal base plate and LTCC substrate structure

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Owner:NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC

Flexible circuit board, manufacturing method thereof and display device

ActiveCN113645758AImprove welding qualityImprove welding yieldPrinted circuit assemblingElectrical connection printed elementsFlexible circuitsDisplay device

The invention provides a flexible circuit board, a manufacturing method thereof and a display device. The flexible circuit board comprises a main board and a small board, the main board is provided with at least one first welding area for exposing a part of a first conductive layer, the small board is provided with at least one second welding area for exposing a part of a second conductive layer, the second welding area comprises a welding hole, the orthographic projection of the second welding area on the mainboard is at least partially overlapped with the first welding area, and the first conductive layer and the second conductive layer are connected through a welding structure. The welding structure comprises: a first layer of welding flux which is located on the first conductive layer part exposed by the first welding area; a second layer of welding flux which is located on the part, exposed out of the second welding area, of the second conducting layer, wherein at least part of the second layer of welding flux is welded and fixed to the first layer of welding flux through the welding hole; and a high-melting-point connecting piece, wherein one end of the high-melting-point connecting piece is located in the first layer of welding flux, the other end of the high-melting-point connecting piece is located in the second layer of welding flux in the welding hole, and the melting point of the high-melting-point connecting piece is higher than that of the first layer of welding flux and that of the second layer of welding flux. According to the flexible circuit board, the manufacturing method thereof and the display device, the welding quality and the welding yield of the circuit board can be improved.

Owner:BOE TECH GRP CO LTD +1