1. A package comprising an electronic device with a plurality of device contact pads and further a plurality of electrically conductive frame contact pads, which device is attached to the frame contact pads in a die attach area with a die attach adhesive, which device contact pads are coupled to frame contact pads outside the die attach area with connecting elements, and which device and which connecting elements are encapsulated in an electrically insulating encapsulation, in which encapsulation the frame contact pads outside the die attach area are anchored, and which frame contact pads have a surface that is exposed outside the encapsulation,
wherein the frame contact pads each comprise a first patterned layer and a second patterned layer, which second layer has the surface that is exposed outside the encapsulation,
at least some of the frame contact pads have their surface exposed outside the encapsulation below and within the die attach area and have a first patterned layer with a first pattern that comprises at least one flange that extends to a position outside the die attach area, such that the flange is partially covered by the die attach area, and wherein the contacting elements connect to the flange outside the die attach area,
wherein the first pattern is the same inside the die attach area as outside the die attach area.
2. A package as claimed in claim 1, wherein the first pattern comprises at least three flanges.
3. A package as claimed in claim 2, wherein an angle between individual flanges is in the range of about 60 to 120 degrees.
4. A package as claimed in claim 1, wherein a second portion of the frame contact pads in the die attach area has a first patterned layer with a second pattern.
5. A package as claimed in claim 1, wherein electrical connections between individual contact pads are provided with wirebonds.
6. A package as claimed in claim 1, wherein the die attach adhesive comprises a first and a second layer.
7. A package as claimed in claim 1, wherein the die attach area is divided into a inner area and a perimeter area, and wherein the die attach adhesive is present in the inner area, while the encapsulation extends into the perimeter area of the die attach area, therewith mechanically anchoring the electronic device into the encapsulation.
8. A method of manufacturing a package comprising an electronic device with a plurality of device contact pads and further a plurality of electrically conductive frame contact pads, comprising:
providing a electrically conductive frame having a first layer and a second layer, which first layer is patterned with a first pattern to define a plurality of frame contact pads and which second layer is continuous;
attaching the device to the frame contact pads in a die attach area with a die attach adhesive,
electrically coupling the device contact pads to frame contact pads outside the die attach area with connecting elements
encapsulating the device and the connecting elements in an electrically insulating encapsulation, which encapsulation extends to encapsulate exposed portions of the first patterned layer of the frame;
patterning the continuous second layer of the frame into the frame with a second pattern to define portions of the frame contact pads with a surface that is exposed outside the encapsulation,
wherein the first pattern defines frame contact pads with at least one flange,
wherein at least some of the frame contact pads (102) have their surface exposed outside the encapsulation below and within the die attach area, and have at least one flange that extends to a position outside the die attach area, such that the flange is partially covered by the die attach area,
wherein the first pattern is the same inside the die attach area as outside the die attach area.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A photochromic article comprising an at least partially cured polymerizable photochromic polymer composition comprising (1) a reaction product of:
(a) at least one photochromic material having at least one group polymerizable via addition polymerization; and
(b) at least one material copolymerizable with said photochromic material (a); and
(2) a material co-polymerizable with said polymerizable photochromic polymer composition, such that the reaction product comprising the photochromic article provides a Fade Half Life in the Photochromic Polymer Performance Test reduced over that provided by a photochromic material free of polymerizable groups.
2. The photochromic article of claim 1 wherein the particles are at least partially coated.
3. The photochromic article of claim 2 wherein the particles are at least partially coated with a protective coating.
4. The photochromic article of claim 3 wherein the protective coating is a solgel coating.
5. A photochromic article comprising an at least partially cured polymeric host material and a photochromic amount of at least one photochromic polymer composition comprising a reaction product of:
at least one photochromic material having at least one polymerizable group; and at least one material copolymerizable with said photochromic material of (a); said material being adapted to form a polymer upon polymerization having a glass transition temperature less than 23\xb0 C.; said reaction product being adapted to provide a reduced Fade Half Life in the Photochromic Polymer Performance Test than photochromic material (a) free of polymerizable groups.
6. The photochromic article of claim 5 wherein the polymeric host material is a polymer chosen from thermosetting or thermoplastic polymeric materials.
7. The photochromic article of claim 6 wherein the polymeric host material is a polymer chosen from poly(urea-urethane), poly(C1-C12 alkyl methacrylates), poly(oxyalkylene) dimethacrylates, poly(alkoxylated phenol methacrylates), cellulose acetate, cellulose triacetate, cellulose acetate propionate, cellulose acetate butyrate, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinylidene chloride), thermoplastic polycarbonates, polyesters, polyurethanes, polysilanes, polysiloxanes, polythiourethanes, poly(ethylene terephthalate), polystyrene, poly(alpha methylstyrene),copoly(styrene-methylmethacrylate), copoly(styrene-acrylonitrile), polyvinylbutyral and polymers of polyol(allyl carbonate) monomers, polyfunctional acrylate monomers, polyfunctional methacrylate monomers, diethylene glycol dimethacrylate monomers, diisopropenyl benzene monomers, ethoxylated bisphenol A dimethacrylate monomers, ethylene glycol bismethacrylate monomers, poly(ethylene glycol) bismethacrylate monomers, ethoxylated phenol methacrylate monomers, alkoxylated polyhydric alcohol acrylate monomers, diallylidene pentaerythritol monomers, urethane acrylate monomers, vinylbenzene monomers, styrene monomers or a mixtures thereof.
8. The photochromic article of claim 5 wherein the photochromic article is an optical element.
9. The photochromic article of claim 8 wherein the optical element is an ophthalmic lens or a contact lens.
10. A photochromic article comprising a substrate comprising an at least partial coating of an at least partially cured photochromic coating composition on at least one surface of said substrate, said photochromic coating composition comprising a photochromic amount of at least one photochromic polymer composition comprising a reaction product of:
(a) at least one photochromic material having at least one polymerizable group; and
(b) at least one material copolymerizable with said photochromic material of (a); said material being adapted to form a polymer upon polymerization having a glass transition temperature less than 23\xb0 C.;
said reaction product being adapted to provide a reduced Fade Half Life in the Photochromic Polymer Performance Test than photochromic material (a) free of polymerizable groups.
11. The photochromic article of claim 10 wherein the substrate comprises paper, glass, ceramic, wood, masonry, textile, metal or polymeric material.
12. The photochromic article of claim 11 wherein the polymeric material comprises a polymer chosen from thermosetting or thermoplastic polymeric materials.
13. The photochromic article of claim 10 wherein the substrate comprises an optical element.
14. The photochromic article of claim 10 wherein the at least partially cured photochromic coating composition comprises a film-forming polymer composition.
15. The photochromic article of claim 14 wherein the film-forming polymer composition comprises thermoplastic or thermosetting film-forming polymer.
16. The photochromic article of claim 15 wherein the film-forming polymer is a thermosetting polymer and is chosen from polyurethanes, aminoplast resins, poly(meth)acrylates, polyanhydrides, polyacrylamides, epoxy resins or polysilanes.
17. The photochromic article of claim 10 further comprising an at least partial coating of a primer composition interposed between the at least partially cured photochromic coating composition and the substrate.
18. The photochromic article of claim 17 further comprising an at least partial coating of a protective coating at least partially applied to the surface of the at least partially cured photochromic coating composition.
19. A photochromic article comprising an at least partially cured polymeric host material comprising an at least partial coating of an at least partially cured photochromic coating composition on at least one surface of said at least partially cured polymeric host material, said photochromic coating composition comprising a photochromic amount of at least one photochromic polymer composition, said photochromic polymer composition comprising a reaction product of:
(a) at least one photochromic material having at least one polymerizable group; and
(b) at least one material copolymerizable with said photochromic material of (a); said material being adapted to form a polymer upon polymerization having a glass transition temperature less than 23\xb0 C.;
said reaction product being adapted to provide a reduced Fade Half Life in the Photochromic Polymer Performance Test than photochromic material (a) free of polymerizable groups.
20. The photochromic polymer composition of claim 19 wherein the reaction product is adapted to provide a greater A OD in the Photochromic Polymer Performance Test than photochromic material (a) free of polymerizable groups.
21. A photochromic polymer composition comprising a reaction product of at least two polymerizable photochromic material and at least one other copolymerizable material, said reaction product having a glass transition temperature of less than 23\xb0 C. and being adapted to provide a reduced Fade Half Life in the Photochromic Polymer Performance Test as compared to the same photochromic material used in the reaction product, but free of polymerizable groups.