Abstract:
This process comprises: placing (70) chips in preset locations by attracting a transfer layer of the chip using a pad, the attractive force between the transfer layer and the pad being a force chosen from the group composed of a magnetic force, an electrostatic force and an electromagnetic force; and bonding (74) the chips thus placed on respective receiving zones of an active side of a receiver substrate, this bonding comprising: preparing (30, 62, 72) bonding sides of the chips and the receiving zones so that they are able to bond without adhesive, then in step c), bringing (78) each bonding side into direct contact with its respective receiving zone and thus bonding the chips to the receiver substrate without adhesive.
Abstract:
Systems and methods for transferring a micro device from a carrier substrate are disclosed. In an embodiment, a mass transfer tool manipulator assembly allows active alignment between an array of electrostatic transfer heads on a micro pick up array and an array of micro devices on a carrier substrate. Displacement of a compliant element of the mass transfer tool manipulator assembly may be sensed to control alignment between the array of electrostatic transfer heads and the array of micro devices.
Abstract:
Systems and methods for transferring a micro device from a carrier substrate are disclosed. In an embodiment, a micro pick up array mount includes a pivot platform to allow a micro pick up array to automatically align with a carrier substrate. Deflection of the pivot platform may be detected to control further movement of the micro pick up array.
Abstract:
Electrostatic transfer head array assemblies and methods of transferring and bonding an array of micro devices to a receiving substrate are described. In an embodiment, a method includes picking up an array of micro devices from a carrier substrate with an electrostatic transfer head assembly supporting an array of electrostatic transfer heads, contacting a receiving substrate with the array of micro devices, transferring energy from the electrostatic transfer head assembly to bond the array of micro devices to the receiving substrate, and releasing the array of micro devices onto the receiving substrate.
Abstract:
A micro device transfer head and head array are disclosed. In an embodiment, the micro device transfer head includes a base substrate, a mesa structure with sidewalls, an electrode formed over the mesa structure, and a dielectric layer covering the electrode. A voltage can be applied to the micro device transfer head and head array to pick up a micro device from a carrier substrate and release the micro device onto a receiving substrate.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Bonden eines ersten Substrats (4) mit einem zweiten Substrat (4'), wobei das erste Substrat (4) und/oder das zweite Substrat (4') vor dem Bonden gedünnt ist/wird. Die Substrate (4, 4') können Wafer, Halbleitersubstrate, metallische Substrate, mineralische Substrate, insbesondere Saphirsubstrate, Glassubstrate oder Polymersubstrate sein. Das erste Substrat (4) und/oder das zweite Substrat (4') werden zum Dünnen und/oder Bonden auf einem auf einer Trägeroberfläche (3o, 3o') eines, insbesondere einen ringförmigen Rahmen (2) aufweisenden, Trägers (3, 3') fixiert. Das erste Substrat (4) und das zweite Substrat (4') werden vor dem Bonden an Hand von korrespondierenden Ausrichtungsmarkierungen der Substrate (4, 4') zueinander ausgerichtet und anschließend, insbesondere magnetisch, vorfixiert. Substratfixierungen weisen jeweils eine Substratfixierfläche (9) zur Fixierung jeweils eines Substrats (4, 4') und jeweils eine die Substratfixierfläche (9) umgebende Trägerfixierfläche (8) oder Trägerfixierbereich zur gegenseitigen Fixierung der Substratfixierungen auf, wobei insbesondere die Trägerfixierfläche (8) oder der Trägerfixierbereich magnetisiert oder magnetisierbar ist, oder alternativ die Substratfixierungen mittels eines Klebers, über Klemmen, über ein Stecksystem oder elektrostatisch miteinander fixierbar sind.
Abstract:
Methods and structures for forming arrays of LED devices are disclosed. The LED devices in accordance with embodiments of the invention may include an internally confined current injection area to reduce non-radiative recombination due to edge effects. Several manners for confining current may include etch removal of a current distribution layer, etch removal of a current distribution layer and active layer followed by mesa re-growth, isolation by ion implant or diffusion, quantum well intermixing, and oxide isolation.
Abstract:
A display panel and a method of forming a display panel are described. The display panel may include a thin film transistor substrate including a pixel area and a non-pixel area. The pixel area includes an array of bank openings and an array of bottom electrodes within the array of bank openings. An array of micro LED devices are bonded to the corresponding array of bottom electrodes within the array of bank openings. An array of top electrode layers are formed electrically connecting the array of micro LED devices to a ground line in the non-pixel area.