Electronic Device Housing Utilizing A Metal Matrix Composite
A housing used for electronic devices includes a structural frame element formed of a metal matrix composite (MMC) for providing improved stiffness over other materials currently in use. The MMC is a metal matrix (formed of a material such as aluminum), with a reinforcing material (such as a glass fiber or ceramic) dispersed within the metal matrix. The composition of the reinforcing material, as well as the ratio of reinforcing material to metal, define the stiffness (resistance to bending) and/or strength (resistance to breaking) achieved, and various compositions may be used for different housings, depending on the use of the electronic device. The element may be configured as a structural frame member, or may be embedded within another material forming the structural frame element. In another embodiment, the MMC may be used to form various components of the complete housing, including the enclosure itself.
1 . An electronic device housing comprising
a first structural frame element comprising a first metal matrix composite (MMC) material exhibiting a first Young's modulus value; and
at least one second structural frame element comprising a second MMC material exhibiting a second Young's modulus value less than the first Young's modulus value, the first structural frame element forming a rigid housing component and the at least one second structural frame element forming a lightweight housing component., with the first and at least one second structural frame elements disposed in a non-overlapping configuration in the electronic device housing.
2 . The electronic device housing as defined in claim 1 wherein the first structural frame element comprises larger dimensions than the at least one second structural frame element.
3 . The electronic device housing as defined in claim 1 wherein the rigid housing component formed of the first structural frame element comprises at least one sidewall of the electronic device housing.
4 . The electronic device housing as defined in claim 3 wherein the rigid housing component comprises at least a pair of opposing sidewalls formed of the first MMC material.
5 . The electronic device housing as defined in claim 1 wherein the lightweight housing component formed of the at least one second structural frame element comprises at least one corner region of the electronic device housing.
6 . The electronic device housing as defined in claim 1 wherein the second Young's modulus value is on the order of 125 GPa.
7 . The electronic device housing as defined in claim 1 wherein the first Young's modulus value is on the order of 200 GPa.
8 . An electronic device housing comprising a structural frame element of a single metal matrix composite (MMC) material of a composition and a ratio of reinforcing material to metal selected to exhibit a stiffness greater than 125 GPa with a high value of elastic deformation and a high thermal conductivity.
9 . The electronic device housing as defined in claim 8 wherein the MMC material comprises a ceramic-reinforced MMC material.
10 . The electronic device housing as defined in claim 9 wherein the ceramic-reinforced MMC material comprises Al—SiC.
11 . The electronic device housing as defined in claim 8 wherein the housing further comprises an outer casing, with the MMC material structural frame element embedded within the outer casing.
12 . The electronic device housing as defined in claim 11 wherein the outer casing comprises aluminum.