Abstract: An exemplary method for making a soft mold is provided. A transparent substrate is provided. A to-be-solidified film is formed on the transparent substrate. A stamper and a guiding plate are further provided. The guiding plate is positioned between the stamper and the to-be-solidified film. The stamper inserts one of the through holes of the guiding plate. The first alignment mark is aligned with one of the second alignment marks. The stamper is pressed into the to-be-solidified film. The pressed portion of the to-be-solidified film is solidified to obtain a second molding surface on the to-be-solidified film. The previous steps are repeated for the stamper and the rest of the through holes of the guiding plate to obtain a soft mold having a plurality of the second molding surfaces.

Abstract: An exemplary grinding method includes, firstly, providing a holding device including a first rotatable pressing portion and a second rotatable pressing portion, and providing a base. Then a number of workpieces are placed into a groove of the base. Two blocking members identical in shape are placed in the groove, with the workpieces therebetween. The blocking members are moved towards the workpieces to closely align with the workpieces. The sizes of the blocking members are compared with that of each workpiece, and then the blocking members are removed. If the workpieces are larger than the blocking members, the workpieces are thereafter held between the first and second pressing portions. Next, the base is removed and the first and second pressing portions are driven to rotate. Subsequently, the workpieces are ground, and then a number of finished products are obtained.

Abstract: An exemplary method for fabricating a mold core includes the following steps. First, an ultraviolet (UV) transmitting glass substrate is provided. Second, a photo resist layer is formed on the substrate. Third, the photo resist layer is exposed under a UV light and developed to form a plurality of spaced through holes therein. Fourth, the areas of the surface of the substrate under the through holes are etched to form a plurality of cavities. Fifth, each cavity is filled with a light-curable material, and the photo resist layer is removed. Sixth, the light-curable material is solidified to form a light-cured material block in each cavity. Lastly, the light-cured material block in each cavity is machined using an ultra-precision machine to form a molding surface of the light-cured material block. Thereby, the mold core with a plurality of the molding surfaces is obtained.

Abstract: In a method for manufacturing a lens mold, a raw mold is provided. The raw mold defines a cavity therein. The cavity defines a raw molding surface. The raw molding surface includes a molding surface portion. The molding surface portion includes a center. Photoresist material is filled in the cavity, covering the molding surface portion. A photo mask is provided. The photo mask defines a through hole. The size through hole is the same as the molding surface portion of the lens mold. The photo mask is placed above the photoresist material with the through hole aligned with the center. The photoresist material is exposed and developed to form a photoresist portion. A rigid molding material is filled in the cavity. The resist portion is removed to expose the molding surface.

Abstract: An exemplary solar energy conversion device includes a substrate, a solar energy conversion chip, and a carbon nanotube layer. The substrate defines a through hole. The solar energy conversion chip is positioned on the substrate and covers the through hole. The solar energy conversion chip includes a light incident surface facing away from the substrate and a heat dissipating surface at an opposite side thereof to the light incident surface. The carbon nanotube layer is formed on the heat dissipating surface.

Abstract: An optical fiber connector includes a housing, a plurality of lenses fixed to the housing, a plurality of optical fibers, and a glue. The housing defines a plurality of blind holes and receiving cavities. Each blind hole includes a first receiving hole portion. Each receiving cavity is in communication with the corresponding first receiving hole portion. Each optical fiber is received in the corresponding blind hole and includes a core portion. The glue is applied in each receiving cavity and fixes the optical fibers in the housing. Along a lengthwise direction of each blind hole, a projection of each receiving cavity on a plane perpendicular to the lengthwise direction covers that of the core portion. The glue surrounds the core portion, and a distal end of the core portion contacts an inner surface of the housing in the corresponding receiving cavity facing the respective blind hole.

Abstract: A method for manufacturing a polarizer utilizes a support, which is coated with a photoresist. A carbon nanotube film is located over the photoresist, and one portion of the carbon nanotube film is submerged in the photoresist. Metal or semi-metallic particles are deposited over the carbon nanotube film and the photoresist, which is removed. The carbon nanotube film with the metal particles or semi-metallic particles is adhered to a substrate to obtain the polarizer.

Abstract: Manufacturing spherical Fresnel lens includes providing a first optical element with a regular hexagonal first Fresnel micro-lens in the center of the first optical element and six regular hexagonal second Fresnel micro-lens arrayed around the first Fresnel micro-lens. One edge of the second Fresnel micro-lens is connected to one edge of the first Fresnel micro-lens. The first optical element is stressed to yield a spherical cap configuration of the first optical element, and a second optical element is provided matched to the first optical element, and including a plurality of Fresnel micro-lens. The second optical element is bent into a curve shaped configuration having a curvature as the bent first optical element, and a number of bent second optical elements are assembled around the bent first optical element in sequence to form a hemispherical-shaped configuration.

Abstract: An exemplary light emitting diode package includes a housing, and a light emitting unit received in the housing. The light emitting unit includes a first carbon nanotube layer, a plurality of spaced light emitting chips, and a second carbon nanotube layer. The light emitting chips are formed on the first carbon nanotube layer. The second carbon nanotube layer covers the light emitting chips.

Abstract: The present application provides a method and semiconductor packaging structure comprising a conductive substrate having a first surface, a first lateral surface and a second lateral surface adjacent to the first surface. A first electrode line with two ends are provided on the first surface and the first lateral surface, and a second electrode line with two ends are provided on the first surface and a second lateral surface respectively. A semiconductor device is provided on the first surface of the conductive substrate which electrically connected to the first electrode line and the second electrode line, a protective plate with through holes covers the first surface, and a sheathing overlays the semiconductor device.

Abstract: A method for press molding a lens array is provided. First, a mold core is provided. The mold core has a first surface having a first alignment formed thereon using a lithography method, and a lens molding surface array and a second alignment formed thereon using an ultra-precision machining method. Then, a substrate is provided. The substrate has a second surface having a third alignment mark formed thereon using the lithography method. The substrate is first aligned with the mold core by aligning the third alignment mark with the first alignment mark, then is further aligned by offsetting the substrate the spacing between the first and second alignment marks to align the center of the substrate with the center of the lens molding surface array. Finally, a molding material is applied on the substrate, then the mold core is applied on the molding material to press mold the lens array.

Abstract: An exemplary method for making a lens array having many lenses includes the follow steps. A light pervious substrate including a supporting surface is firstly provided. Secondly, a molten molding material is applied on the supporting surface. Thirdly, a pressing mold including many molding parts is provided, each molding part including a molding cavity for molding the lens. Fourthly, the pressing mold is pressed on the molten molding material. Fifthly, the molten molding material is half-cured, thereby forming a half-cured molding material. Sixthly, the half-cured molding material is pressed by the pressing mold. Seventhly, the half-cured molding material is fully cured to form each lens in each molding cavity. Finally, the pressing mold is removed from the light pervious substrate to form the lens array.

Abstract: A workpiece includes a positional marker and defines a number of round recesses. The positional marker includes first positional projection, at least one second positional projection, and at least one third positional projection. The first positional projection defines a first diagonal and a second diagonal. The second positional projection is arranged along the first diagonal, and has a diagonal on the first diagonal. The third positional projection is arranged along the second diagonal, and has a diagonal on the second diagonal. Each of the first positional projection, the at least one second positional projection, and the at least one third positional projection is surrounded by four round recesses of the number of round recesses.

Abstract: In a method for manufacturing a lens mold, a raw mold is provided. The raw mold defines a cavity therein. The cavity defines a raw molding surface. The raw molding surface includes a molding surface portion. The molding surface portion includes a center. Photoresist material is filled in the cavity, covering the molding surface portion. A photo mask is provided. The photo mask defines a through hole. The size through hole is the same as the molding surface portion of the lens mold. The photo mask is placed above the photoresist material with the through hole aligned with the center. The photoresist material is exposed and developed to form a photoresist portion. A rigid molding material is filled in the cavity. The resist portion is removed to expose the molding surface.

Abstract: An exemplary method for making an alignment mark on a substrate includes the following steps. First, a substrate with a recess is provided. Second, a photoresist layer is formed on a surface of the substrate including in the recess. Third, the photoresist layer is exposed and developed to leave a body of remaining photoresist in the recess, with the body of remaining photoresist protruding above the surface of the substrate. Fourth, a metal layer is formed in an unfilled area of the recess and on the surface of the substrate, with the metal layer substantially surrounding the remaining photoresist. Finally, the remaining photoresist is removed to form an alignment mark in the metal layer on the substrate.

Abstract: A method for manufacturing a mold used in impression process is provided. The method includes the following steps: forming a negative photoresist layer between a transparent substrate and a supporting substrate; exposing the negative photoresist layer via the transparent substrate by direct writing technology; removing the supporting substrate; and developing the negative photoresist layer to form the mold.

Abstract: An exemplary lens includes a light pervious substrate, a first optically active part, and a light blocking film. The light pervious substrate has a first surface, an opposite second surface, and a recess defined in the first surface. The recess includes a bottom surface. The first optically active part is formed on the bottom surface. The light blocking film is formed on the bottom surface surrounding the first optically active part.

Abstract: An exemplary method for fabricating a mold core includes the following steps. First, an ultraviolet (UV) transmitting glass substrate is provided. Second, a photo resist layer is formed on the substrate. Third, the photo resist layer is exposed under a UV light and developed to form a plurality of spaced through holes therein. Fourth, the areas of the surface of the substrate under the through holes are etched to form a plurality of cavities. Fifth, each cavity is filled with a light-curable material, and the photo resist layer is removed. Sixth, the light-curable material is solidified to form a light-cured material block in each cavity. Lastly, the light-cured material block in each cavity is machined using an ultra-precision machine to form a molding surface of the light-cured material block. Thereby, the mold core with a plurality of the molding surfaces is obtained.

Abstract: An exemplary method for making a soft mold is provided. A transparent substrate is provided. A to-be-solidified film is formed on the transparent substrate. A stamper and a guiding plate are further provided. The guiding plate is positioned between the stamper and the to-be-solidified film. The stamper inserts one of the through holes of the guiding plate. The first alignment mark is aligned with one of the second alignment marks. The stamper is pressed into the to-be-solidified film. The pressed portion of the to-be-solidified film is solidified to obtain a second molding surface on the to-be-solidified film. The previous steps are repeated for the stamper and the rest of the through holes of the guiding plate to obtain a soft mold having a plurality of the second molding surfaces.

Abstract: A first lens having a first bottom surface and a first top surface at opposite sides thereof; and a first supporter having a first supporting surface and a second supporting surface at opposite sides thereof, the first supporting surface being flat, the second supporting surface being in contact with the first bottom surface, the first supporter being made of transparent material, and a refraction index of the first supporter being different from a refraction index of the first lens. A lens assembly array and method of making the lens assembly array are also provided.