Molded lens over LED die
First Claim
1. A method for forming an optical element over a light emitting diode (LED) die comprising:
- providing a plurality of non-encapsulated LED dies mounted on a single submount support structure, the support structure having metal leads in electrical contact with metal contacts on each LED die, the LED dies forming a two-dimensional pattern on the support structure;
providing a first mold having indentations corresponding to the pattern of LED dies on the support structure;
filling the indentations in the first mold with a liquid first lens material prior to the LEDs dies being positioned within the indentations;
bringing the first mold and the support structure together so that the LED dies are within the liquid first lens material so as to directly contact the liquid lens material;
curing the liquid first lens material until it hardens;
removing the support structure from the first mold so that a first lens formed from the hardened first lens material overlies each of the LED dies and fully encapsulates each of the LED dies; and
singulating the submount support structure into portions, wherein mounted on each portion is at least one encapsulated LED die.
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Accused Products
Abstract
One or more LED dice are mounted on a support structure. The support structure may be a submount with the LED dice already electrically connected to leads on the submount. A mold has indentations in it corresponding to the positions of the LED dice on the support structure. The indentations are filled with a liquid optically transparent material, such as silicone, which when cured forms a lens material. The shape of the indentations will be the shape of the lens. The mold and the LED dice/support structure are brought together so that each LED die resides within the liquid silicone in an associated indentation. The mold is then heated to cure (harden) the silicone. The mold and the support structure are then separated, leaving a complete silicone lens over each LED die. This over molding process may be repeated with different molds to create concentric shells of lenses. Each concentric lens may have a different property, such as containing a phosphor.
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Citations
16 Claims
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1. A method for forming an optical element over a light emitting diode (LED) die comprising:
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providing a plurality of non-encapsulated LED dies mounted on a single submount support structure, the support structure having metal leads in electrical contact with metal contacts on each LED die, the LED dies forming a two-dimensional pattern on the support structure; providing a first mold having indentations corresponding to the pattern of LED dies on the support structure; filling the indentations in the first mold with a liquid first lens material prior to the LEDs dies being positioned within the indentations; bringing the first mold and the support structure together so that the LED dies are within the liquid first lens material so as to directly contact the liquid lens material; curing the liquid first lens material until it hardens; removing the support structure from the first mold so that a first lens formed from the hardened first lens material overlies each of the LED dies and fully encapsulates each of the LED dies; and singulating the submount support structure into portions, wherein mounted on each portion is at least one encapsulated LED die. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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2. A method for forming an optical element over a light emitting diode (LED) die comprising:
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providing a plurality of non-encapsulated LED dies mounted on a single submount support structure, the support structure having metal leads in electrical contact with metal contacts on each LED die, the LED dies forming a two-dimensional pattern on the support structure; providing a first mold having indentations corresponding to the pattern of LED dies on the support structure, wherein there are no liquid flow channels between the indentations; filling the indentations in the first mold with a liquid first lens material prior to the LEDs dies being positioned within the indentations; bringing the first mold and the support structure together so that the LED dies are within the liquid first lens material so as to directly contact the liquid lens material; curing the liquid first lens material until it hardens; removing the support structure from the first mold so that a first lens formed from the hardened first lens material overlies each of the LED dies and fully encapsulates each of the LED dies; and singulating the submount support structure into portions, wherein mounted on each portion is at least one encapsulated LED die. - View Dependent Claims (3)
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Specification