Abstract:
Mechanical layers and methods of shaping mechanical layers are disclosed. In one embodiment, a method includes depositing a support layer (85), a sacrificial layer (84) and a mechanical layer (34) over a substrate (20), and forming a support post (60) from the support layer. A kink (90) is formed adjacent to the support post in the mechanical layer. The kink comprises a rising edge (91) and a falling edge (92), and the kink is configured to control the shaping and curvature of the mechanical layer upon removal of the sacrificial layer.
Abstract:
A method of fabricating an electromechanical device which comprises a step of etching a sacrificial layer with an etchant comprising a noble gas fluoride, e.g. xenon difluoride (XeF2). The efficiency of the etching process may be increased in various ways, and the cost of an etching process may be decreased. Unused etchant may be isolated and recirculated during the etching process. Etching byproducts may be collected and removed from the etching system during the etching process. Components of the etchant may be isolated and used to general additional etchant. Either or both of the etchant or the layers being etched may also be optimized for a particular etching process.
Abstract:
This disclosure provides systems, methods and apparatus for providing illumination by using a light guide (120) to distribute light. In one aspect, a passivation layer (110) is attached to the light guide of an illumination device. The passivation layer may be an optically transparent moisture barrier and may have a thickness and refractive index which allows it to function as an anti - reflective coating. The passivation layer may protect moisture - sensitive underlying features, such as metallized light turning features (140) that may be present in the light guide. The light turning features may be configured to redirect light out of the light guide. In some implementations, the redirected light may be applied to illuminate a display.
Abstract:
A method of fabricating an electonic device which comprises a step of etching a sacrificial layer with an etchant comprising a noble gas fluoride, e.g. Xenon Fluoride (Xe F2). The efficiency of the etching process may be increased in various ways, and the cost of an etching process may be decreased. Unused etchant may be isolated and recirculated during the etching process. Etching byproducts may be collected and removed from the etching system during the etching process. Components of the etchant may be isolated and used to general additional etchant. Either or both of the etchant or the layers being etched may also be optimized for a particular etching process.
Abstract:
This disclosure provides systems, methods and apparatus for a MEMS device. In one aspect, an electromechanical systems apparatus includes a substrate, a stationary electrode positioned over the substrate, a movable electrode spaced from the stationary electrode by a gap, and at least one support structure extending above the movable electrode. The support structure includes an inorganic dielectric layer and a polymer layer.
Abstract:
This disclosure provides systems, methods and apparatus for fabricating electromechanical system devices within a plasma-etch reaction chamber. In one aspect, a plasma-etch system includes a plasma-etch reaction chamber, an inlet in fluid communication with the reaction chamber, a cathode positioned within the reaction chamber and a non-hollow anode positioned within the reaction chamber between the inlet and the cathode. The inlet is configured to introduce a process gas into the reaction chamber such that at least a portion of the process gas strikes an upper surface of the anode and is allowed to flow across the upper surface and around the edges of the anode. The anode can be a liner plate in place of a showerhead.
Abstract:
A microelectromechanical systems (MEMS) device includes a substrate (20), an array region (ARRAY), and a peripheral region (INTERCONNECT). The array region (ARRAY) includes a lower electrode (16A, 16B), a movable upper electrode (14), and a cavity (19) between the lower electrode (16A, 16B) and the upper electrode (14). The peripheral region (INTERCONNECT) includes a portion of a layer forming the upper electrode (14) in the array region (ARRAY) and an electrical interconnect (58). The electrical interconnect (58) includes a conductive material (50) electrically connected to at least one of the lower electrode (16A, 16B) and the upper electrode (14). The electrical interconnect (58) is formed of a layer separate from and below the layer forming the upper electrode (14) in the array region (ARRAY). The conductive material (50) is selected from the group consisting of nickel, chromium, copper, and silver.
Abstract:
A microelectromechanical device (MEMS) utilizing a porous electrode surface for reducing stiction is disclosed. In one embodiment, a microelectromechanical device is an interferometric modulator 80 that includes a transparent electrode 81 having a first surface 81a; and a movable reflective electrode 82 with a second surface 82a facing the first surface 81a. The movable reflective electrode 82 is movable between a relaxed and actuated (collapsed) position. An aluminum layer is provided on either the first or second surface. The aluminum layer is then anodized to provide an aluminum oxide layer 83 which has a porous surface 83a. The porous surface 83a, in the actuated position, decreases contact area between the electrodes 81 and 82, thus reducing stiction.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for forming layers within a MEMS device to achieve a tapered edge.SOLUTION: Certain MEMS devices include layers patterned to have tapered edges. One method for forming layers having tapered edges includes the use of an etch leading layer. Another method for forming layers having tapered edges includes the deposition of a layer in which the upper portion is etchable at a faster rate than the lower portion. Another method for forming layers having tapered edges includes the use of multiple iterative etches. Another method for forming layers having tapered edges includes the use of a liftoff mask having an aperture including a negative angle, such that a layer can be deposited over the liftoff mask and the mask layer is removed, thereby leaving a structure having tapered edges.
Abstract:
PROBLEM TO BE SOLVED: To provide a MEMS device having a support structure and a method of fabricating the same.SOLUTION: Embodiments of MEMS devices includes a conductive movable layer spaced apart from a conductive fixed layer by a gap, and supported by rigid support structures, or rivets, overlying depressions in the conductive movable layer, or by posts underlying depressions in the conductive movable layer. In certain embodiments, portions of the rivet structures extend through the movable layer and contact underlying layers. In other embodiments, the material used to form the rigid support structures may also be used to passivate otherwise exposed electrical leads in electrical connection with the MEMS devices, protecting the electrical leads from damage or other interference.