Abstract:
A method of producing a MEMS device provides a first substrate having a first interior surface and thickness, and a second substrate having a second interior surface. The method also forms at least one closed wall on at least one of the first and second substrates, weakens the first substrate in a plane generally parallel to the first interior surface, and secures the first substrate to the second substrate. The at least one closed wall extends between the first interior surface and the second interior surface. The method further separates a portion of the first substrate along the plane generally parallel to the first interior surface after securing the first and second substrates, and removes an excess portion of the first substrate to produce a reduced thickness first substrate of no greater than about 20 microns.
Abstract:
A method for forming a multi-material thin film includes providing a multi-material donor substrate comprising single crystal silicon and an overlying film comprising GaN or SiC. Energetic particles are introduced through a surface of the multi-material donor substrate to a selected depth within the single crystal silicon. The method includes providing energy to a selected region of the donor substrate to initiate a controlled cleaving action in the donor substrate. Then, a cleaving action is made using a propagating cleave front to free a multi-material film from a remaining portion of the donor substrate, the multi-material film comprising single crystal silicon and the overlying film.
Abstract:
A technique for forming a film of material (12) from a donor substrate (10). The technique has a step of introducing energetic particles (22) through a surface of a donor substrate (10) to a selected depth (20) underneath the surface, where the particles have a relatively high concentration to define a donor substrate material (12) above the selected depth. An energy source is directed to a selected region of the donor substrate to initiate a controlled cleaving action of the substrate (10) at the selected depth (20), whereupon the cleaving action provides an expanding cleave front to free the donor material from a remaining portion of the donor substrate.
Abstract:
A monolithically integrated MEMS pressure sensor and CMOS substrate using IC-Foundry compatible processes. The CMOS substrate is completed first using standard IC processes. A diaphragm is then added on top of the CMOS. In one embodiment, the diaphragm is made of deposited thin films with stress relief corrugated structure. In another embodiment, the diaphragm is made of a single crystal silicon material that is layer transferred to the CMOS substrate. In an embodiment, the integrated pressure sensor is encapsulated by a thick insulating layer at the wafer level. The monolithically integrated pressure sensor that adopts IC foundry-compatible processes yields the highest performance, smallest form factor, and lowest cost.
Abstract:
A technique for forming a film of material (12) from a donor substrate (10). The technique has a step of forming a stressed region in a selected manner at a selected depth (20) underneath the surface. An energy source such as pressurized fluid is directed to a selected region of the donor substrate to initiate a controlled cleaving action of the substrate (10) at the selected depth (20), whereupon the cleaving action provides an expanding cleave front to free the donor material from a remaining portion of the donor substrate.
Abstract:
In one aspect, the present invention provides a method for fabricating two layers separated by a gap comprising the steps of: (a) providing a first material; (b) treating the first material to reduce the number of available bonding centers; (c) placing a second material over the first material and allowing bonds to form between the two materials to form a composite; and (d) separating the composite so formed along the boundary of the two materials. In a further aspect, subsequent layers of material may be introduced to the composite by repeating steps (b) and (c) under conditions where adhesion between the subsequent layers is greater, smaller or substantially the same as the adhesion between the first and second material.
Abstract:
A process for cutting out a block of material (10) comprising the following stages: (a) the formation in the block of a buried zone (12), embrittled by at least one stage of ion introduction, the buried zone defining at least one superficial part (14) of the block, (b) the formation at the level of the embrittled zone of at least one separation initiator (30, 36) by the use of a first means of separation chosen from amongst the insertion of a tool, the injection of a fluid, a thermal treatment and/or implantation of ions of an ionic nature different from that introduced during the preceding stage, and (c) the separation at the level of the embrittled zone of the superficial part (14) of the block from a remaining part (16), called the mass part, from the separation initiator (30, 36) by the use of a second means, different from the first means of separation and chosen from among a thermal treatment and/or the application of mechanical forces acting between the superficial part and the embrittled zone. Application for the manufacture of components for micro-electronics, opto-electronics or micro-mechanics.
Abstract:
A technique for forming a film of material (12) from a donor substrate (10). The technique has a step of forming a stressed region in a selected manner at a selected depth (20) underneath the surface. An energy source such as pressurized fluid is directed to a selected region of the donor substrate to initiate a controlled cleaving action of the substrate (10) at the selected depth (20), whereupon the cleaving action provides an expanding cleave front to free the donor material from a remaining portion of the donor substrate.
Abstract:
A technique for forming a film of material (12) from a donor substrate (10). The technique has a step of introducing energetic particles (22) in a selected manner through a surface of a donor substrate (10) to a selected depth (20) underneath the surface, where the particles have a relatively high concentration to define a donor substrate material (12) above the selected depth and the particles for a pattern at the selected depth. An energy source such as pressurized fluid is directed to a selected region of the donor substrate to initiate a controlled cleaving action of the substrate (10) at the selected depth (20), whereupon the cleaving action provides an expanding cleave front to free the donor material from a remaining portion of the donor substrate.
Abstract:
A technique for forming films of material (12) from a donor substrate (10). The technique has a step of introducing energetic particles (22) through a surface of a donor substrate (10) to a selected depth (20) underneath the surface, where the particles have a relatively high concentration to define donor substrate material (12) above the selected depth. Energy is provided to a selected region of the substrate to cleave a thin film of material from the donor substrate. Particles are introduced again into the donor substrate underneath a fresh surface of the donor substrate. A second thin film of material is then cleaved from the donor substrate.