Abstract:
Disclosed is a method for structuring a planar substrate made of a glass-type material, which is characterized by the following steps: - the thickness of the planar semiconductor substrate is reduced within at least one surface area thereof so as to obtain a surface area that is raised relative to the surface areas having a reduced thickness; - the raised surface area of the planar semiconductor substrate is structured by locally removing material in a mechanical manner so as to introduce recesses within the raised surface area; - the structured surface of the planar semiconductor substrate is connected to the glass-type planar substrate such that the glass-type planar substrate at least partly covers the surface area having a reduced thickness; - the connected planar substrates are heated up such that the glass-type planar substrate which covers the surface area having a reduced thickness forms a fluid-tight connection along with the surface area having a reduced thickness in a first heating phase which is carried out at negative pressure conditions, the planar substrate covering the recesses in a fluid-tight manner at negative pressure conditions, whereupon at least some areas of the glass-type material flow into the recesses of the structured surface of the planar semiconductor substrate in a second heating phase. Also disclosed are a glass-type planar substrate and the use thereof.
Abstract:
Method for encapsulation of a microelectronic component, including making of a portion of sacrificial material on a front face of a first substrate in which the component is intended to be made, then making of a cover encapsulating the portion of sacrificial material, then making of the component by etching the first substrate from its back face, such that part of the component is arranged to face the portion of sacrificial material and such that the portion of sacrificial material is accessible from a back face of the component, then elimination of the portion of sacrificial material by etching from the back face of the component, then securing of the back face of the component to a second substrate.
Abstract:
A process for the manufacture of semiconductor devices comprising the chemical-mechanical polishing of a substrate or layer containing at least one III-V material in the presence of a chemical-mechanical polishing composition (Q1) comprising (A) inorganic particles, organic particles, or a mixture or composite thereof, (B) at least one amphiphilic non-ionic surfactant having (b1) at least one hydrophobic group; and (b2) at least one hydrophilic group selected from the group consisting of polyoxyalkylene groups comprising (b22) oxyalkylene monomer units other than oxyethylene monomer units; and (M) an aqueous medium.
Abstract:
Disclosed herein is a method of smoothing a trench sidewall after a deep trench silicon etch process which minimizes sidewall scalloping present after the silicon trench etch. The method comprises exposing the silicon trench sidewall to a plasma generated from a fluorine-containing gas, at a process chamber pressure within the range of about 1 mTorr to about 30 mTorr, for a time period within the range of about 10 seconds to about 600 seconds. A substrate bias voltage within the range of about −10 V to about −40 V is applied during the performance of the post-etch treatment method of the invention.
Abstract:
A highly aqueous, strongly basic planarizing solution and a process for its use to reducing or essentially eliminating protrusions or projections extending generally upwardly from a generally planar surface of polysilicon film produced by Low Temperature Poly Si (LTPS) annealing a film of amorphous silicon deposited on a substrate; the process including contacting the surface of the generally planar polysilicon film with the highly aqueous, strongly basic solution for a time sufficient to selectively etch the protrusions or projections from the surface of the generally planar polysilicon film without any significant etching of the generally planar polysilicon film, said highly aqueous, strongly basic solution being a solution having a pH of 12 or higher and comprising water, at least one strong base, and at least one etch rate control agent.
Abstract:
A highly aqueous, strongly basic planarizing solution and a process for its use to reducing or essentially eliminating protrusions or projections extending generally upwardly from a generally planar surface of polysilicon film produced by Low Temperature Poly Si (LTPS) annealing a film of amorphous silicon deposited on a substrate; the process including contacting the surface of the generally planar polysilicon film with the highly aqueous, strongly basic solution for a time sufficient to selectively etch the protrusions or projections from the surface of the generally planar polysilicon film without any significant etching of the generally planar polysilicon film, said highly aqueous, strongly basic solution being a solution having a pH of 12 or higher and comprising water, at least one strong base, and at least one etch rate control agent.
Abstract:
Beschrieben wird ein Verfahren zur Strukturierung eines aus glasartigen Material bestehenden Flächensubstrats. Das erfindungsgemässe Verfahren zeichnet sich durch die Kombination der folgenden Verfahrensschritte aus: - Bereitstellen eines aus einem Halbleitermaterial bestehenden Halbleiter Flächensubstrats, - Dickenreduzieren des Halbleiter-Flächensubstrats innerhalb wenigstens eines Oberflächenbereiches des Halbleiter-Flächensubstrates zur Ausbildung eines gegenüber des dickenreduzierten Oberflächenflächenbereiches erhabenen Oberflächenbereiches, - Strukturieren des erhabenen Oberflächenbereiches des Halbleiter Flächensubstrats mittels lokalen mechanischem Materialabtrag, zum Einbringen von Vertiefungen innerhalb des erhabenen Oberflächenbereiches,.- Verbinden der strukturierten Oberfläche des Halbleiter-Flächensubstrats mit dem glasartigen Flächensubstrat derart, dass das glasartige Flächensubstrat zumindest teilweise den dickenreduzierten Oberflächenflächenbereich überdeckt, - Tempern der verbundenen Flächensubstrate derart, dass in einer ersten Temperphase, die unter Unterdruckbedingungen durchgeführt wird, das den dickenreduzierten Oberflächenbereich überdeckende glasartige Flächensubstrat mit dem dickenreduzierten Oberflächenbereich eine fluiddichte Verbindung eingeht, wobei das Flächensubstrat die Vertiefungen unter Unterdruckbedingungen fluiddicht überdeckt, und dass in einer zweiten Temperphase ein Hineinfliessen wenigstens von Teilbereichen des glasartigen Materials in die Vertiefungen der strukturierten Oberfläche des HalbleiterFlächensubstrats erfolgt.
Abstract:
A method of removing polysilicon in preference to silicon dioxide and/or silicon nitride by chemical mechanical polishing. The method removes polysilicon from a surface at a high removal rate while maintaining a high selectivity of polysilicon to silicon dioxide and/or a polysilicon to silicon nitride. The method is particularly suitable for use in the fabrication of MEMS devices.
Abstract:
The invented method is distinguished by a combination of the following method steps: provision of a semiconductor planar substrate composed of a semiconductor material, reduction of the thickness of the semiconductor planar substrate inside at least one surface region of the semiconductor planar substrate in order to form a raised surface region in relation to the surface planar region of reduced thickness, structuring the raised surface region of the semiconductor planar substrate by means of local mechanical removal of material in order to place impressions inside the raised surface regions, joining the structured surface of the semiconductor planar substrate with the glasslike planar substrate in such a manner that the glasslike planar substrate at least partially covers the surface planar region of reduced thickness, tempering the joined planar substrates in such a manner that in a first tempering phase, which is conducted under vacuum conditions, the glasslike planar substrate covering the surface region of reduced thickness forms a fluid-tight bond with the surface region of reduced thickness, with the planar substrate covering the impressions in a fluid-tight manner under vacuum conditions, and that in a second tempering phase, at least partial areas of the glasslike material flow into the impressions of the structured surface of the semiconductor planar substrate.
Abstract:
The invented method is distinguished by a combination of the following method steps: provision of a semiconductor planar substrate composed of a semiconductor material, reduction of the thickness of the semiconductor planar substrate inside at least one surface region of the semiconductor planar substrate in order to form a raised surface region in relation to the surface planar region of reduced thickness, structuring the raised surface region of the semiconductor planar substrate by means of local mechanical removal of material in order to place impressions inside the raised surface regions, joining the structured surface of the semiconductor planar substrate with the glasslike planar substrate in such a manner that the glasslike planar substrate at least partially covers the surface planar region of reduced thickness, tempering the joined planar substrates in such a manner that in a first tempering phase, which is conducted under vacuum conditions, the glasslike planar substrate covering the surface region of reduced thickness forms a fluid-tight bond with the surface region of reduced thickness, with the planar substrate covering the impressions in a fluid-tight manner under vacuum conditions, and that in a second tempering phase, at least partial areas of the glasslike material flow into the impressions of the structured surface of the semiconductor planar substrate.