Subscriber identity module (SIM) card
View Patent ↗A SIM card is presented. The SIM card includes a support carrier having a first and a second major surface. The support carrier includes a cavity which extends partially into the carrier from the first major surface. The SIM card further includes a chip package disposed within the cavity. The support carrier is sufficiently flexible to bend when the SIM card is being inserted into or removed from a SIM card holder.
1. A SIM card comprising:
a support carrier having a first and a second major surface, the support carrier having a cavity which extends partially into the carrier from the first major surface, wherein the cavity includes sidewalls and a bottom surface, the sidewalls are contiguous with the first major surface of the support carrier and the bottom surface is a continuous planar surface which is contiguous with bottom of the sidewalls;
an adhesive disposed over the bottom surface of the cavity; and
a chip package attached within the cavity, the chip package having a cap which encapsulates at least one SIM device disposed on a top surface of a package substrate,
wherein the cap contacts the adhesive disposed over the bottom surface of the cavity and the support carrier is sufficiently flexible to bend when the SIM card is being inserted into or removed from a SIM card holder.
2. The SIM card of claim 1 wherein the chip package includes a multi-functional chip package.
3. The SIM card of claim 2 wherein the multi-functional chip package includes at least one functional component disposed on the top surface of a package substrate.
4. The SIM card of claim 3 wherein:
the at least one SIM device includes a memory chip or a microprocessor chip; and
the at least one functional component includes a RF IC, a decoder or a security chip.
5. The SIM card of claim 3 , wherein the support carrier includes a flexible plastic material.
6. The SIM card of claim 5 wherein the flexible plastic material includes ABS, PVC or polycarbonate.
7. The SIM card of claim 3 wherein the cap encapsulates the at least one functional component disposed on the top surface of a package substrate.
8. The SIM card of claim 2 wherein the multi-functional chip package includes a multi-layer substrate.
9. The SIM card of claim 1 wherein the support carrier comprises an injection molded support carrier.
10. The SIM card of claim 9 wherein the support carrier is injection molded to an actual size of the SIM card.
11. A method for forming a SIM card, comprising:
providing a support carrier having a first and a second major surface, the support carrier having a cavity which extends partially into the carrier from the first major surface, wherein the cavity includes sidewalls and a bottom surface, the sidewalls are contiguous with the first major surface of the support carrier and the bottom surface is a continuous planar surface which is contiguous with bottom of the sidewalls;
providing an adhesive over the bottom surface of the cavity;
providing a chip package having a cap which encapsulates at least one SIM device disposed on a top surface of a package substrate; and
attaching the chip package within the cavity,
wherein the cap contacts the adhesive disposed over the bottom surface of the cavity, the SIM card is formed without overmolding and the support carrier is sufficiently flexible to bend when the SIM card is being inserted into or removed from a SIM card holder.
12. The method of claim 11 wherein the chip package includes a multi-functional chip package.
13. The method of claim 12 wherein the multi-functional chip package is formed by selecting the at least one SIM device and at least one functional component and attached on the top surface of a package substrate.
14. The method of claim 13 wherein:
the at least one SIM device includes a memory chip or a microprocessor; and
the at least one functional component includes a RF IC, a decoder or a security chip.
15. The method of claim 13 wherein the cap encapsulates the at least one functional component disposed on the top surface of a package substrate.
16. The method of claim 15 comprises forming electrical connections to electrically connect the at least one SIM device and at least one functional component to the package substrate.
17. The method of claim 11 wherein the package substrate includes a bottom surface, the bottom surface of the package substrate is coplanar with the first major surface of the support carrier.
18. The method of claim 11 wherein the support carrier is formed by injection molding into an actual size of the SIM card.
19. The method of claim 18 wherein the support carrier includes a flexible plastic material.
20. The SIM card of claim 1 wherein the package substrate includes a bottom surface, the bottom surface of the package substrate is coplanar with the first major surface of the support carrier.