Abstract:
Method of manufacturing a vertically aligned laminated graphene based thermally conductive film. The method comprising: attaching first and second graphene film (200, 202) using a layer of nanoparticles (204) and an adhesive (210); forming (110) a layered film (212) comprising a predetermined number of graphene film layers by repeating the steps of arranging (104) a layer of nanoparticles, arranging (106) an adhesive and attaching (108) a graphene film; and laminating (112) the layered film by applying pressure and heat to cure the adhesive, thereby forming a laminate film (216); cutting (114) the laminate film at an angle in relation to a surface plane of the film to form the vertically aligned laminated graphene based thermally conductive film (218).
Abstract:
There is provided a method for manufacturing carbon based via interconnects comprising: providing a first substrate; forming a plurality of catalyst pads on the substrate; growing carbon nanotube (CNT) bundles on the catalyst pads; forming a metal coating on the carbon nanotube bundles comprising a Ti-layer followed by an Au-layer; providing a second substrate; forming via connection through openings in the second substrate, the via connection through openings having the same configuration as the array of catalyst pads; inserting the carbon nanotube bundles into the via connection openings of the second substrate; removing the first substrate such that the carbon nanotube bundles remain in the via connection openings of the second substrate; and infiltrating a metal in the carbon nanotube bundlesby means of copper electroplating
Abstract:
There is provided an apparatus for manufacturing nanoparticles comprising: a container comprising a liquid; an anode and a cathode arranged facing each other in the container, wherein the anode is movable in relation to the cathode; a power supply connected to the anode and the cathode; a current transducer control system comprising a current sensor for detecting a discharge current from an electrostatic discharge between the anode and the cathode, resulting in formation of metal nanoparticles through melting and evaporation of the anode. A motor controls the movement of the anode to control the distance between the anode and the cathode; and a control unit controls the motor to move the anode towards the cathode until a discharge current is detected by the current transducer control system, and when a discharge current is detected,to stop movement of the anode towards the cathode, and to determine a new movement speed and movement direction of the anode based on a consumption rate of the anode such that the discharge is interrupted.
Abstract:
A process for synthesis of silica coated graphene hybrid material comprising the steps of treating graphene oxide with ammonium ions to provide ammonium- activated graphene oxide; treating the ammonium-activated graphene oxide with a solution comprising silica precursors; and silane coupling agents that comprise functional groups, to provide self-assembly of silica nanoparticles on the surface of the ammonium-activated graphene oxide and covalent bonding between the nanoparticles and the surface to provide silica coated graphene oxide; and grafting of the functional groups on the surface of the silica coated graphene oxide to provide functionalized silica coated graphene oxide; and reducing the functionalized silica coated graphene oxide to provide functionalized silica coated graphene. Silica coated graphene hybrid material obtainable by this process.
Abstract:
Heat sink and method of manufacturing a graphene based heat sink (300), the method comprising: providing (100) a first and second graphene film; arranging (104) a layer of nanoparticles (204) on a surface (206, 208) of the first and second graphene film to improve an adhesion strength between the graphene films; attaching (108) the second graphene film to the first graphene film by means of an adhesive and the layer of nanoparticles; forming (110) a laminated graphene film (212) comprising a number of graphene film layers by repeating the steps, wherein the laminated graphene film (212) is formed to have an anisotropic thermal conductivity; assembling (112) a plurality of laminated graphene films by applying pressure and heat to cure the adhesive to form a graphene block (214); and removing (114) selected portions of the graphene block to form a heat sink comprising fins (304) extending from a base plate (302) of the heat sink.
Abstract:
The invention relates to a heat spreading structure (100) comprising: a first substrate layer (102); a second substrate layer (104); and a thermally conductive graphite film (106) sandwiched between the first and second substrate layers, wherein the graphite film comprises a plurality of graphene layers having a turbostratic alignment between adjacent graphene layers. The invention also relates to a method for manufacturing a graphite film for a heat spreading structure.
Abstract:
There is provided a method for manufacturing a thermal interface material, the method comprising:forming (100) a porous mat comprising graphene fibers; heating (102) the mat to form a graphite fiber matwhere the graphene based fibers exhibits a turbostratic crystal structure; metal plating (104) of the graphite fiber mat; and metal infiltration (106) of the metal plated graphite fiber mat.
Abstract:
According a first aspect of the invention, there is provided an arrangement (100) for manufacturing a roll (102) of graphene. The arrangement comprises a supply reel (104) configured to hold a strip of graphene film (106); a winding reel (108) configured to wind a strip of graphene film into a roll of graphene film; a motor controlling the winding reel; and a dispenser (110) configured to dispense a fluid adhesive (112) on a graphene film running from the supply reel to the winding reel. There is also provided a method form manufacturing a graphene film using sing the described arrangement, where the method comprises cutting the manufactures graphene roll into sheets of graphene film.