The present invention relates to a transfer head and a method of manufacturing a micro LED display using the same. In particular, the present invention relates to a transfer head and a method of manufacturing a micro LED display using the same, the transfer head mounting normal micro LEDs on a display substrate without performing a complicated process of sorting out defective micro LEDs from the micro LEDs mounted on the display substrate and replacing the defective micro LEDs with normal micro LEDs.

Embodiments relate to forming an elastomeric interface layer (elayer) with a flap over multiple light emitting diode (LED) dies by forming materials across multiple LED dies and removing the materials between the LED dies. The formed flap of the elayer provides a large surface area for adhesion between each LED and a pick-up surface. For example, the flap may have a surface area that is larger than the light emitting surface of the LED die, or larger than the surface area of an elastomeric interface layer without the flap. As such, the elayer allows each LED to be picked up by a pick-up surface and placed onto a display substrate including control circuits for sub-pixels of an electronic display. In some embodiments, the LED dies are micro-LED (μLED) dies.

A mounting method is a method for mounting a diced semiconductor chip having a first face that is held on a carrier substrate and a second face that is an opposite face of the first face on a circuit board placed on a mounting table. The mounting method includes affixing the second face of the semiconductor chip to an adhesive sheet, removing the carrier substrate from the semiconductor chip, reducing an adhesive strength of the adhesive sheet, and mounting the semiconductor chip on the circuit board by holding a first face side of the semiconductor chip with a head to separate the semiconductor chip from the adhesive sheet, and joining a second face side of the semiconductor chip to the circuit board.

A mounting apparatus (10) serves to place a film between an electronic component and a bottom surface of a mounting head and mount the electronic component. The mounting apparatus includes: a film winding mechanism (18) that rotates a winding reel (26) to wind in a film spanning from a dispensing reel to the winding reel (26), the film winding mechanism (18) executing the winding so that a new film is disposed on the bottom surface of the mounting head each time when an electronic component is mounted; a tension detecting part (38) that detects the tension of the film after the same is wound by the film winding mechanism (18); and a control part (20) that rotates the winding reel (26) by a winding motor (30) to adjust the tension on the basis of the tension detected by the tension detecting part (38). A film supply apparatus is also provided.

A method of producing a bonded chip stack is described. A first nanofluidic device chip having a first through-wafer via is formed. A second nanofluidic device chip having a second through-wafer via is formed. The first nanofluidic device chip and the second nanofluidic device chip are washed with a detergent solution. A first surface of the first nanofluidic device chip and a second surface of the second nanofluidic device chip are activated by treating the first surface and the second surface with an activation solution. The first nanofluidic device chip and the second nanofluidic device chip are arranged in a stack. The first through-wafer via is aligned with the second through-wafer via in a substantially straight line. The stack of first and second nanofluidic device chips is subjected to annealing conditions.

A method of producing a bonded chip stack is described. A first nanofluidic device chip having a first through-wafer via is formed. A second nanofluidic device chip having a second through-wafer via is formed. The first nanofluidic device chip and the second nanofluidic device chip are washed with a detergent solution. A first surface of the first nanofluidic device chip and a second surface of the second nanofluidic device chip are activated by treating the first surface and the second surface with an activation solution. The first nanofluidic device chip and the second nanofluidic device chip are arranged in a stack. The first through-wafer via is aligned with the second through-wafer via in a substantially straight line. The stack of first and second nanofluidic device chips is subjected to annealing conditions.

Embodiments relate to using photocurable polymers to place light emitting diodes (LEDs) onto an electronic display substrate after fabrication of the LEDs. A LED assembly system places LEDs on a temporary substrate after fabrication and applies a a photocurable polymer onto the top surfaces of the LEDs. A transparent pickup head aligns with a subset of the LEDs. The pickup head is positioned on the top surfaces of the subset of LEDs such that the layer of the photocurable polymer is in between the pickup head and the top surface of the subset of the LEDs. Light is directed through the pickup head to cure the photocurable polymer, adhering the subset of LEDs to the pickup head. The subset of LEDs is removed away from the temporary substrate, due to relative movement between the temporary substrate and the pickup head.

A pressurizing device includes: a mounting base; an upper mold which pressurizes the target object mounted on the mounting base from above; a heating lower mold which is a lower mold heated in advance by a heater, and which heats the target object under pressure by sandwiching the mounting base with the upper mold; a cooling lower mold which is a lower mold cooled in advance by a cooler, and which cools the target object under pressure by sandwiching the mounting base with the upper mold; and a control device which switches the lower mold that contributes to the pressurization of the target object to the heating lower mold or the cooling lower mold in accordance with the status of progress of the pressurization process for the target object.

This flux transfer apparatus (10) comprises: a stage (12) having a recessed portion (13) for collecting flux (51); a flux pot (20) which is an annular member having a through hole (21) into which the flux (51) is introduced, which reciprocates along a top surface (14) of the stage (12) to supply the flux (51) that has been introduced into the through hole (21) into the recessed portion (13), and which levels off the top surface of the flux using a bottom surface (22); and a cooling mechanism (30) for cooling the stage (12). By this means, a rise in the temperature of the stage in the flux collecting apparatus is suppressed.

A method and system for assembling a device by picking up semiconductor devices from a carrier substrate and placing the semiconductor devices onto a target substrate. The transfer of the semiconductor devices uses fluid as a transfer medium. The fluid enters a fluid channel of a pickup head, causing the pickup head to expand, make contact with, and attach to an aligned semiconductor device. After the semiconductor device is aligned with and placed onto the target substrate, at least a portion of the fluid is removed from the pickup head to release the semiconductor device onto the target substrate. The semiconductor device bonds to the target substrate.