A flexible display apparatus including a flexible display panel, a driving chip and a hot-melt protective layer is provided. The flexible display panel has a display area and a bonding area located outside the display area. The driving chip is disposed on the bonding area of the flexible display panel via at least one flexible circuit board. The hot-melt protective layer is disposed on the display area and a portion of the flexible circuit board. The hot-melt protective layer locates on a top surface of the flexible display panel.

A ruggedized direct-view LED display system (100) includes a bonding matrix (215) that helps secure an array of LED chips (205) to a printed circuit board (PCB) (210). The bonding matrix may consist of an epoxy or other resin deposited on the surface (310) of the PCB after soldering the LED chips to the PCB. The bonding matrix has a thickness that is less than the thickness of the LED chips so that light-emitting outer portions (415) of the LED chips are not covered by the bonding matrix material. A method of forming the bonding matrix is also disclosed, including depositing bonding matrix material onto the PCB between the LED chips using nozzles or needles, optionally wicking excess bonding matrix material, and optionally degassing the bonding matrix material before curing it to form the bonding matrix.

A connection structure including: a first circuit member having a plurality of first electrodes; a second circuit member having a plurality of second electrodes; and an intermediate layer having a plurality of bonding portions electrically connecting the first electrodes and the second electrodes, in which at least one of the first electrode and the second electrode that are connected by the bonding portion is a gold electrode, and 90% or more of the plurality of bonding portions include a first region containing a tin-gold alloy and connecting the first electrode and the second electrode and a second region containing bismuth and being in contact with the first region.

An electronic device including a thermosetting bonding sheet may include: a base substrate including a base substrate body and a plurality of base pads disposed on the base substrate body, a connection substrate including a connection substrate body facing the base substrate body, a plurality of connection pads disposed on the connection substrate body and including a pad hole, and a plurality of connection lines disposed on the connection substrate body and connected to the plurality of connection pads, a solder, at least a portion of which is inserted into the pad hole, disposed on the base pad and configured to electrically connect the base pad to the connection pad, and a thermosetting bonding sheet provided between the base substrate body and the connection substrate body, bonded to the base substrate body and the connection substrate body, and enclosing the solder

A method of manufacturing an electronic module includes supplying paste to an electronic component and/or a wiring board. The paste includes solder powder and first resin. The method includes supplying second resin to the electronic component and/or the wiring board. The method includes placing one of the electronic component and the wiring board on another. The method includes curing the second resin to form a second resin portion. The method includes heating the paste to a temperature equal to or higher than a solder melting point after the second resin portion is formed. The method includes solidifying molten solder at a temperature lower than the solder melting point to form a solder portion that bonds the electronic component and the wiring board. The method includes curing the first resin after the solder portion is formed, to form a first resin portion.

A circuit board assembly includes a first circuit board and a second circuit board. The first circuit board includes a first contact pad and defines a stamped protrusion being correspondingly positioned relative to a position of the first contact pad, the first contact pad being outside the stamped protrusion. The second circuit board includes a second contact pad. The first contact pad on the stamping protrusion is in contact with the second contact pad to achieve electronic connections between the first circuit board and the second circuit board. A method for manufacturing the circuit board assembly is further disclosed.

An electronic package is provided. The electronic package includes a first circuit structure, a second circuit structure, and an underfill. The second circuit structure is disposed over the first circuit structure. The underfill is disposed between the first circuit structure and the second circuit structure. An inner portion of the underfill has an inner lateral surface adjacent to and is substantially conformal with a lateral surface of the second circuit structure. A first top end of the inner lateral surface is not level with a top surface of the second circuit structure. An outer portion of the underfill has a second top end higher than the first top end.

In an embodiment, a method of manufacturing (100) is described. The method comprises providing (102) a first layer defining a first inner surface (203a) and a first outer surface (203b), a second layer defining a second inner surface (205a) and a second outer surface (205b), and an electrical component (206) positioned on the first inner surface or the second inner surface. The method further comprises attaching (104) the first and second layers together to create a device (200) comprising the first and second layers, wherein the first outer surface and the second outer surface define an external surface of the device. The device further comprises a sealed portion (208) defined by liquid-tight attachment between the first and second inner surfaces. In use of the device, the sealed portion prevents liquid ingress into the device between the first and second layers towards the electrical component.

A circuit board according to an embodiment includes an insulating layer; a circuit pattern disposed on an upper surface of the insulating layer; a first solder resist disposed on an upper surface of the insulating layer and having a height smaller than a height of the circuit pattern; and a second solder resist disposed on an upper surface of the first solder resist and including a first portion having an upper surface lower than an upper surface of the circuit pattern and a second. portion having an upper surface higher than the upper surface of the circuit pattern, wherein the circuit pattern includes: a plurality of first circuit patterns disposed on an upper surface of a first region of the insulating layer, and a plurality of second circuit patterns disposed on an upper surface of a second region of the insulating layer; wherein the first portion of the second solder resist is disposed between the plurality of first circuit patterns to have an upper surface lower than an upper surface of the first circuit pattern; and wherein the second portion of the second solder resist has an upper surface higher than an upper surface of the second circuit pattern, and is disposed to cover the plurality of second circuit patterns between the plurality of second circuit patterns.

A semiconductor package includes a redistribution substrate having a first surface and a second surface which are opposite to each other, a semiconductor chip mounted on the first surface of the redistribution substrate, an under bump interconnection layer on the second surface of the redistribution substrate, an electronic device mounted on the under bump interconnection layer, and a solder bump disposed on the under bump interconnection layer and horizontally spaced apart from the electronic device. The under bump interconnection layer includes conductive patterns respectively connected to the electronic device and the solder bump, and a passivation layer covering the conductive patterns. The passivation layer includes a plurality of trenches disposed between the electronic device and the solder bump.