FIELD

The present invention relates generally to electronic devices, and more particularly to the formation of enclosed housings for electronic devices.

BACKGROUND

Personal computing and electronic devices, such as laptop computers, media players, cellular telephones and the like are becoming increasingly more sophisticated, powerful and consumer friendly. The ability to fabricate various components of these devices in smaller sizes, while still maintaining or increasing the power, operating speed and aesthetic appeal of such devices, has contributed greatly to this trend. Unfortunately, the trend of smaller, lighter and more powerful portable computing devices presents continuing design challenges in the actual formation of some components for these devices. One design challenge associated with such electronic devices and components therefor is the formation of the outer enclosure or housing used to house the various internal device components therein.

In particular, many electronic devices have housings that are made from several different parts, as well as complex mechanical structures, features, and/or other internal parts that must also connect or attach to the housing. Even in the more eloquently designed electronic devices, outer housings are still typically formed from multiple parts, which tends to result in at least seams or other discontinuities, if not exposed screws, tabs or other component fasteners. For example, outer housings made from just two main parts typically include an upper casing and a lower casing that are placed on top of one another and fastened together using screws or other fastening means. Such techniques typically complicate the housing design and create aesthetic difficulties because of undesirable cracks, seams, gaps or breaks at the mating surfaces, as well as exposed fasteners located along the surfaces of the housing. Even where fasteners are hidden or removed altogether from the outer surfaces of an electronic device, a mating line or seam surrounding the entire enclosure is still often produced when using an upper and lower casing.

Although such seams or gaps generally tend to detract from the overall aesthetic appeal of the device, it is typically necessary to form device housings from multiple parts for the simple reason that access to the internal regions of an electronic device or component is needed at least during the manufacture of the device or component. In instances where access to the internal regions of the device or component is really not needed once the device is manufactured, however, the existence of a mating line, gap, seam, or any other artifacts of manufacture are usually an unnecessary and unseemly byproduct of the manufacturing process.

While many designs and techniques used to provide outer housings for electronic devices and components have generally worked well in the past, there is always a desire to provide alternative housing designs and techniques for new and aesthetically pleasing devices.

SUMMARY

It is an advantage of the present invention to provide a single unitary housing for an electronic device that has no apparent seams or other artifacts of manufacture on its outer surface. This can be accomplished at least in part through the use of housing components that have been ultrasonically welded together with the pertinent internal parts already disposed inside the housing to form a single unitary housing that can be machined and refinished at its outer surfaces as a single item.

In various embodiments, an electronic device can include a first housing component having an open cavity, one or more internal electronic parts disposed within the cavity, a second housing component disposed across the cavity, and a support feature disposed within the cavity and arranged to support the second housing component. The first housing component can be at least partially formed from metal, at least at a surface region to be attached to the second housing component, while the second housing component can be formed from a plurality of laminated foil metal layers. The second housing component can be attached to the first housing component via one or more ultrasonic welds, such that a fully enclosed housing is created. The support feature can be arranged to support at least some of the laminated foil metal layers during the ultrasonic welding process. The fully enclosed housing can be hermetically sealed, and the outside surfaces thereof can be machined or otherwise finished after the ultrasonic welding.

In various additional embodiments, a method of manufacturing an electronic device is provided. Such a method can be used in the manufacture of an entire electronic device or only a component of an electronic device, among other possible applications. Various process steps can include selecting a first housing component having an open cavity therein, installing an internal electronic device part within the open cavity, forming a second housing component from a plurality of metal foil layers, positioning a support feature within the open cavity, and attaching the second housing component to the first housing component and across the open cavity such that the cavity is fully enclosed and sealed. The first housing component can have a metal portion that includes a first metallic surface region disposed proximate the cavity. Also, the forming step can include ultrasonically welding the metal foil layers together, and the support feature provides support to the second housing component during the attaching step.

In various detailed embodiments, which can include the electronic device or its method of manufacture, attachment of the first housing component to the second housing component can include ultrasonically welding the second housing component to the first housing component. In addition, the internal electronic device part can include the support feature thereon, and can also be ultrasonically welded to the second housing component as a byproduct of the attaching process.

Other apparatuses, methods, features and advantages of the invention will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims.

