CN101523586A

CN101523586A - Hermetic seals for micro-electromechanical system devices

Info

Publication number: CN101523586A
Application number: CNA2006800242767A
Authority: CN
Inventors: M·X·乌扬
Original assignee: Corning Inc
Current assignee: Corning Inc
Priority date: 2005-06-30
Filing date: 2006-06-14
Publication date: 2009-09-02

Abstract

The invention relates to a hermetically sealed device and a method for making such device. The device includes optical, micro-electromechanical, electronic and opto-electronic devices, having a substrate with one or a plurality of optical, opto-electronic, electronic or micro-electromechanical ('MEMS') elements either singly or in combination that are located on a substrate; a covering having a top part and an extension extending a distance from the top part from the top part, an adhesive that is used to bond the extension portion of the covering to the substrate; and a sealing agent for hermetically sealing the area where the covering extension is bonded to the substrate. In the method of the invention the sealing agent is applied using atomic layer deposition techniques.

Description

The airtight sealing of MEMS devices

Invention field

The present invention relates to MEMS devices, be specifically related to the airtight sealing in this class device and make the method for these sealings.

Background of invention

In having the MEMS (micro electro mechanical system) of exposed electrode (MEMS) device, be difficult to finish the airtight sealing (bonding) between glass and glass (" G/G "), glass and silicon (" G/S ") and silicon and the silicon (" S/S ").Examples of applications with exposed electrode includes OLED (OLED) and digital light processing (DLP ^TM) packing technique, or the like.Briefly, the DLP device comprises cover, covers the interior mirror or the windowpane of mirror group and/or other functional element and airtight sealing cover.When being subjected to temperature limitation, for example must use less than 250 ℃ with when especially sealing less than 150 ℃ temperature, this packing of airtight sealing is difficulty very.In this case, when electrode exposes, can not use the local laser heating to seal, because localized heating can weaken or destroy the electrode combination.When the airtight sealing tack temperature is out of question, dielectric material can be deposited upon on the electrode, be that solder bonds laser is realized airtight sealing with indium then.Yet this method is only useful when low-voltage, and can only low frequency applications; Subject matter is the cross-talk (cross-talk) between the electrode.The visible a lot of patent publications of the example of packing DLP device comprise the U.S. 6,667,837; 6,745,449; 6,586,831; 6,624,921; 6,455,927; With 6,627,814.

In the DLP packaging applications, as the MEMS mirror of DLP core or mirror group must air-tight package in having the cover of windowpane to allow the light turnover.Must carry out airtight sealing to prevent that mirror is polluted by (for example) dust granule in comprising the operation of equipment process of DLP.In a lot of existing methods, Kovar

7056 are used as encapsulant is bonded together windowpane and the cover that contains DLP mirror or mirror group.Though this material provides good sealing, be used to realize that operation bonding and sealing wastes time and energy, so cost is very high.So, wish very much to find a kind of airtight sealing the device for example distinct methods and/or material of OLED and DLP device of can be used for.The invention discloses a kind of at OLED, DLP with need to realize in other device of airtight sealing the new method of airtight sealing.Except sealing DLP device, the inventive method also can be used for not containing windowpane other install for example DLP control device, and other optics, photoelectricity and electrical devices.

Summary of the invention

The present invention relates to the device of airtight sealing, comprise optics, micro electronmechanical, electronics and electrooptical device, it comprises: have one or more substrates of optics, photoelectricity, electronics or micro electronmechanical (" MEMS ") element of form alone or in combination, also be included in any electrode or the optical wire or the electric wire of the above element of this substrate and/or device, it can be used for setting up electricity or optics contact with other device that separates or element; Have a plurality of continuous legs (leg) or the shell of extension in the one side, the leg of this shell or extension are bonded in substrate by adhesive or jointing material, chamber or volume that formation is limited by shell and substrate or limits basically, this chamber or volume surround described element, allow chamber components and outdoor element and/or device electricity or optics to contact simultaneously; With, sealant with described shell, adhesive and substrate contacts, by indoor optics, photoelectricity, electronics or microcomputer electric component that shell, adhesive and substrate limit, allow the electricity of chamber components and/or optical wire to lead to outdoor location and/or element with airtight sealing simultaneously.

The digit optical that the invention still further relates to airtight sealing is handled (" DLP ") device, and it has: with electronic chip operability contacting electronic chip or the microcomputer electric component on the substrate; The shell that has a plurality of legs or extension on it, described leg or extension are bonded in described substrate by adhesive or binding; With, sealant with described shell, adhesive and substrate contacts, with airtight sealing by shell, adhesive and substrate limit indoor, with electronic chip operability contacting electronic chip or microcomputer electric component, allow chamber components and outdoor element and/or device to electrically contact simultaneously.

The invention still further relates to the digit optical projection arrangement of airtight sealing, it has: the micro mirror in this device, and described micro mirror group contacts with integrated circuit chip operability on the substrate; Shell, have and allow planar transparent window that visible light passes through and in a side of window and stretch out a plurality of legs or the extension of a segment distance from this window, described leg or extension are bonded in electrode on described substrate and/or the substrate to form the chamber by adhesive or binding, and the sealant that contacts with electrode on shell, adhesive and substrate and/or the substrate, the indoor micro mirror group and the connected electronic chip that limit by shell, adhesive and substrate with airtight sealing.Electrode or electric wire can pass coating, shell, adhesive and/or substrate and extend out to outdoor other device and/or element from electronic chip or from the mirror group of installing.

Another aspect of the present invention relates to the method for making the DLP device, the MEMS or control chip or other the selected element that have airtight sealing in the described device, said method comprising the steps of: the substrate with one or more semiconductor chips is provided, and operability is connected with add ons or does not connect add ons on each chip; Provide transparent or opaque shell (or cap), a plurality of extensions that it has the top and one side is stretched out continuously from the top or " leg "; Between shell leg and substrate or the electrode material on it, shell is bonded in electrode material on substrate or the substrate with adhesive or binding; Divide the substrate that (dicing) has bonding shell on it along predetermined line, so that each MEMS or other device is separated from one another; Institute's favored area with photoresist or other selected protectiveness coated materials MEMS or other device; Each MEMS or other device are placed the container that is fit to the deposition sealant; Sealant is deposited on MEMS or other device; With remove photoresist or other protectiveness material, produce MEMS or, in the zone of photoresist or other protectiveness material protection sealant do not arranged on it other device.

The present invention relates to the DLP device of airtight sealing on the other hand, but it has light permeability windowpane or shell and sealant, but described shell has by adhesive or binding and is bonded in substrate or is deposited on the light permeability windowpane of the electrode on the substrate, and described sealant is deposited on adhesive or binding is adhered to windowpane or cap in the zone of the electrode material on substrate or the substrate; Any space between the electrode on described sealant covering adhesive material and filling glass window or cap and substrate or the substrate, it comprises the seal bond material.

The accompanying drawing summary

That Figure 1A-1C represents is of the prior art, can be included in individual digit optical treatment (DLP) device (1B) microcomputer Electronic Speculum group (MEMS) (1A), known in the art, this digit optical is handled the DLP control device (1C) that (DLP) device has the permeable window of light and has light tight cap.

Fig. 2 is the end view of the digital micro-mirror device in the cover in the prior art.

Fig. 3 represents a kind of that windowpane or non-glass cap is bonding or be sealed to first step in the two-step method of the electrode on wafer or the wafer, and described first step comprises high temperature adhesives (tempera bonding) (epoxy resin) and demarcate (dicing).

Fig. 4 represents second step in the two-step method, wherein after demarcating and placing photoresist on each device, deposits sealant with airtight sealing windowpane or non-glass cap with atomic layer deposition method (ALD).

Fig. 5 is one jiao a enlarged drawing of Fig. 4 (C) shown device, shows that the shell adherend is adhered on the substrate, has applied photoresist and sealant.

Fig. 6 is the enlarged drawing of Fig. 4 (D), shows that the shell adherend is adhered on the substrate, and except that the position of binding, photoresist and sealant are removed.

Fig. 7 A-7D shows the growth mechanism of the binary compound that is applied by ALD, and wherein substrate is S, and precursor is ML and AN, and the film on the substrate is MN, and volatile materials is LA.

Fig. 8 shows the conformal coating 110 that is applied on the substrate 100.

Fig. 9 shows the difform conformal coating 100 that is applied on the substrate 100.

Figure 10 shows crossing current ALD reactor.

Figure 11 shows a plurality of DLP devices is remained on chip support (holder) in the reactor shown in Figure 10.

Figure 12 shows single shell from the bottom, continuous leg or extension 22 that it has top 20, the described housing exterior girth of restriction and stretches out a segment distance from the top are to limit the volume of representing with a bracket 200.

Figure 13 shows to have the surfaces A-A that will apply with ALD and two devices of B-B, as shown in the figure, is not applied by ALD thereby A-b and B-B are surperficial protected.

Figure 14 A shows a kind of execution mode, and wherein all surface and edge all will be applied by the ALD layer.

Figure 14 B is the enlarged drawing of Figure 14 A, further shows the coating of institute's favored area.

Detailed Description Of The Invention

Term used herein " shell " (" covering ") and " cap " (" cap ") represent a kind of element, continuous " leg " or extension that it has the top and thickness and length are arranged, described top has first or end face and second or bottom surface, whole girth or the circumference around described cover top portion extends a segment distance in a direction (seeing Figure 12) from the bottom surface for described " leg " or extension, thereby when the shell adherend is bonded in element on any substrate and/or the substrate, the shell bottom surface, extension, the combination of binding and substrate defines a closed volume.Shell or cap can be by any materials suitable for any application that will use described device, and this class material comprises silicon, jealous glass, polymer, pottery and ceramics-glass.In addition, shell or cap can have all or part of transparent top of the electromagnetic radiation of selected wavelength.For example, among Figure 12, top 20 can be to visible transparent.Shell also can be light tight or opaque, is used for the control device shown in Fig. 1 (C).

Term used herein " device " comprises optics, micro electronmechanical, electronics and electrooptical device, and it has substrate, has optics, photoelectricity, electronics or micro electronmechanical (" MEMS ") element of independent or any combining form on the substrate.

The present invention relates to the method for bonding and air-tightness seal glass-glass (" G/G "), glass-silicon (" G/S ") and silicon-silicon (" S/S ") and glass or the silicon electrode on glass or the silicon substrate.Particularly, the present invention relates to a kind ofly can handle G/G, G/S and the bonding two-step method that seals of S/S in (DLP) device to the digit optical shown in Figure 1A-1C for example.Fig. 2 shows typical DLP micro-mirror device in the prior art, and its element has description in patent as a reference.

With reference now to Fig. 3,, the first step comprises glass high temperature adhesives (epoxy resin) in silicon wafer and description.Then be second step, carry out airtight sealing with ald as shown in Figure 4.As shown in Figure 3, shell 20 with a plurality of extensions 22, windowpane 20 (this paper is used to describe the present invention) for example, be bonded in the electrode 24 on the silicon wafer (substrate) 26, have on the silicon wafer (substrate) 26 and utilize the epoxy resin 28 that is coated in extension 22 tips and a plurality of DLP elements (seeing 30 in the enlarged drawing) that form.After windowpane 20 was positioned on the electrode, cured epoxy resin was demarcated the wafer that has windowpane on it bar 32 along the line to form independently DLP chip then.What windowpane 20 also can have in advance a deposition covers (shadow) coating, chromium for example, and this layer has also formed pattern on windowpane.After the description, this method forms single DLP device or the chip 40 shown in Fig. 4 A.

With reference to figure 4, form single DLP (last figure) after, the edge of each DLP from the outward flange of glass leg 22 to chip 40 applies photo anti-corrosion agent material 42.Photo anti-corrosion agent material 42 can be any photo anti-corrosion agent material known in the art, for example, and high temperature polymer such as KAPTON ^TMBand or other high-temperature material (seeing Fig. 4 B).Utilize the photoresist protection not need subsequently with aluminium oxide (Al ₂O ₃) or other film regions coated, for example, silicon wafer material and windowpane top and the side shown in the numeral 43.Shown in Fig. 4 B, photoresist does not put on the corner region 44 near leg 22, keeps exposed state so that contain the zone of adhesive.In a preferred embodiment, the part of extension 22 and the wafer of adhesive area also keep exposed state, cover and guarantee good bonding to guarantee material that adhesive is deposited by ALD fully.After applying photoresist, shown in Fig. 4 C, use ald (" ALD ") technology at the film that deposits selected materials near the corner region 44 of leg 22, for example Al ₂O ₃Film.Shown in the numeral 45 of Fig. 4 C, in depositing Al ₂O ₃The time, the photoresist at regional 43 places is also by Al ₂O ₃Apply.Apply Al ₂O ₃Layer is peeled off photoresist after finishing, and the corner region 44 that only stays near epoxy resin is coated with Al ₂O ₃The Al of the photoresist at 43 places, overlay area ₂O ₃Remove together with photoresist.The product that produces is shown in Fig. 4 D, and wherein extension 22 is bonded in the electrode 24 at silicon wafer material 26 tops by epoxy resin 28, and the corner region 44 of extension 22 is by Al ₂O ₃Fill, shown in numeral 45.

Fig. 5 is the part enlarged drawing of Fig. 4 (c), represent this device one jiao, wherein photoresist 42 (middle gray shade) and sealant 45 (Dark grey shade) have put on shell extension 22, and shell extension 22 adherends 28 (white half elliptic) are bonded in the electrode 24 on the substrate 26.The top of hacures and numeral 22 expression shells.

Fig. 6 is the enlarged drawing of Fig. 4 (D), represent this device one jiao, wherein extension 22 is bonded in the place of the electrode 24 on the substrate 26 at binding 28, sealant 45 fit (conform) also seal this angle.

ALD is a kind of known very ripe technology, is used to apply a lot of different dielectric coats.Usually, ALD technology operation under the pressure of 1-10 holder (Torr).The advantage that adopts the ALD technology is the film of deposition its shape of can fitting when being applied on certain material, even can infiltrate aspect ratio (aspect ratio) in the space of 1:100 even higher nanometer size (seeing Fig. 8 and Fig. 9).The characteristics of this uniqueness make ALD be fit to seal any little space and the hole that may exist in the object of processing.The ALD technology described in a lot of science articles, comprise M.Leskela etc., " ald (ALD): from the precursor to the membrane structure " (" Atomic layer deposition (ALD): from precursors to thin film structures "), ThinSolid Films 409 (2002) 138-146; M.D.Groner etc., " the Al that on silicon and various metal substrate, grows by ald ₂O ₃The electrical characteristic of film " (" Electrical characterization of thinAl ₂O ₃Films grown by atomic layer deposition on silicon and various metalsubstrates "), Thin Solid Films 413 (2002) 186-197; With N.D.Hoivik etc.; " the protectiveness film that is used for the ald of micro mechanical system " (" Atomic layer deposited protectivecoatings for micro-mechanical systems "), Sensors and Actuators a103 (2003) 100-108.

The film of known available ALD prepared comprises in this area:

Compound: the ZnS of II-VI family (Group II-VI), ZnSe, ZnTe, ZnS _1-xSe _x, CaS, SrS, BaS, SrS _1-xSe _x, CdS, CdTe, MnTe, HgTe, Hg _1-xCd _xTe, Cd _1-xMn _xTe

II-VI family TFEL:ZnS:M (M D Mn, Tb, Tm), CaS:M (M D Eu, Ce, Tb, Pb), phosphorus SrS:M (M D Ce, Tb, Pb, Mn, Cu)

III-V compounds of group: GaAs, AlAs, AlP, InP, GaP, InAs Al _xGa _1-xAs, Ga _xIn _1-xAs, Ga _xIn _1-xP

Nitride:

Semiconductor/dielectric: AlN, GaN, InN, SiN _x

Metallicity: TiN, TaN, Ta ₃N ₅, NbN, MoN

Oxide:

Dielectric: SiO ₂, Al ₂O ₃, TiO ₂, ZrO ₂, HfO ₂, Ta ₂O ₅, Nb ₂O ₅, Y ₂O ₃, MgO,

CeO ₂，La ₂O ₃，SrTiO ₃，BaTiO ₃

Transparent conductor: In ₂O ₃, In ₂O ₃: Sn, In ₂O ₃: F, In ₂O ₃: Zr, SnO ₂,

SnO ₂:Sb，ZnO，

Semiconductor: ZnO:Al, Ga ₂O ₃, NiO, CoO _x

Superconductor: YBa ₂Cu ₃O _7-x

Other ternary oxide: LaCoO ₃, LaNiO ₃

Fluoride: CaF ₂, SrF ₂, ZnF ₂

Element: Si, Ge, Cu, Mo

Metal: Cu, W, Ti, Ta, Ni, Pt

Other: La ₂S ₃, PbS, In ₂S ₃, CuGaS ₂, SiC

Though the listed any material in front all can be used for optics, electronics, micro electronmechanical and electro-optical system and/or the device of ALD technology so that airtight sealing of the present invention to be provided, but for the DLP that comprises micro mirror and control device uses, cryogenic material preferably can form under 250 ℃ the temperature and/or the material of deposition being lower than.Aluminium oxide (Al ₂O ₃) especially be preferred for application as herein described.

At Al ₂O ₃ALD deposition in, modal precursor material is TMA (trimethyl aluminium) and water (H ₂O).The accessory substance of these material reactions is a methyl alcohol, and it is removed from system.Al ₂O ₃Be preferable material, because it has very wide processing temperature window, scope is from 100 ℃ to 400 ℃.Because this temperature range, the photoresist of height in hand polymerization is as the coated zone of masking material protection.The polymeric material that can be used as photoresist comprises polyimides (Kapton for example

(Du Pont)), polysulfones, polyvinyl aromatic compound (polyaromatics) and fluorocarbon.Al ₂O ₃After the deposition, as mentioned above from Al ₂O ₃Peel off the zone (Al that this zone is deposited that removes close extension 22 in addition that photoresist and photoresist are peeled off together on the object that applies ₂O ₃Film phonograph seal) Al of All Ranges outside ₂O ₃

Fig. 7 A-7D shows the general fashion of implementing ALD.Shown in Fig. 7 A, substrate S is exposed to the first molecular precursor material ML.Shown in Fig. 7 B, this first precursor forms saturated layer on substrate S.Shown in Fig. 7 C, the layer that absorbs is exposed to the second precursor material AN then.Shown in Fig. 7 D, exchange reaction takes place in ML and AN in this process-exposed, forms film MN and accessory substance LA on substrate S, utilizes vacuum to sop up accessory substance LA.Can be by repeating abovementioned steps in a lot of circulations, the film of growth desired thickness.

Fig. 8 and 9 simple displaying when applying coating with the ALD technology, coating 110 is the shape of adhesive substrates 100 how.Hausmann etc., " the highly quick vapour deposition of the silicon nanometer layer of Tie Heing " (" Rapid VaporDeposition of Highly Confroming Silica Nanolaminates "), SCIENCE, on October 11st, 2002, the 298th volume, the 402-406 page or leaf has been described and how have been made the coating of height homogeneous and applying with ALD.In their article, filled with the ALD technology that about 7 μ m are dark, diameter is the nanometer ditch of 0.1-0.2 μ m.This ditch is taper, and its open top is wideer a little than the bottom.The 404th page of this piece article, the width of cloth figure (Fig. 3) that the author provides has shown and has used SiO ₂Before (forming) coating by the reaction of tetramethylsilane and water, among and nanometer ditch afterwards.Especially the bottom that it should be noted that ditch is by silicon dioxide (SiO homogeneous, that 46nm is thick ₂) the film applying.The ALD technology can be carried out stickiness and be applied, thereby makes it can be used for airtight sealing DLP window, control device and other electronics, optics and electrooptical device in the present invention.

Figure 10 shows the constant current ALD reactor (cloth Lars horse system house, Plasma Systems) that has the wafer on chip support and the support.Figure 11 shows the DLP chip support that can be used for air-tightness as herein described edge encapsulating method.Film is deposited on the wafer that is fixed on the chip support both sides as shown in Figure 8 equably.Apply and the sealing chip after, they shift out from reactor, the photoresist of removing support and applying stays extension 22 and substrate or extension by the adhesive sealing between the surface of combination with it.

Adopt ALD technology to carry out that airtight sealing especially seals OLED and the DLP element has a lot of advantages.Adopt the example of the advantage of ALD technology to comprise:

＜150 ℃ of depositing Al ₂O ₃Film.

The film that ALD applies is fitted very much; Coating has been filled any space or the hole between windowpane leg and electrode and/or the bottom substrate.

ALD technology can be used for coating material Al for example ₂O ₃Be deposited on the plastic base.

Available photoresist or other material such as the protection of Kapton band do not need regions coated.

Because the growth rate of each deposition cycle is (self) restriction voluntarily, the thickness that number that therefore can be by adjusting deposition cycle simply and duration are very accurately controlled deposited film.

A lot of DLP chips can be carried on the ALD spreader (coater), especially utilize chip support as shown in Figure 8.

The layer that ALD applies has good adhesiveness to gold utensil, the general electrode as chip of gold.

Also available ALD technology is deposited upon anti-reflective coating the one or both sides of windowpane in processing step independently.

ALD technology is carried out according to predetermined " prescription " or program, and repeatability is very high; This technology does not rely on the operator.

Therefore, the optics that the present invention relates to seal, electronics, micro electronmechanical and electro-optical system and/or device, it has: thereby substrate, have leg shell, be used for that the shell leg is bonded in the jointing material of substrate and put on jointing material combines the shell leg part with substrate seal coating with the sealing-in of shell air-tightness at substrate.The non-limitative example of these devices of available the present invention's preparation comprises: contain the digital micro-mirror device that a plurality of digit opticals are handled (" DLP ") mirror; Control device (for example, the DLP control device shown in Fig. 1 C); Be used to handle and/or the photonic device of transmission optics long-range communication signal; With known other similar device that in substrate or substrate, has shell of optics, photoelectron and electronic applications.

Can be used for suitable substrate of the present invention and comprise glass and highly purified vitreous silica, comprise the glass ceramics of glass and purity fused (being with or without selected dopant), silicon substrate, any composition and known or find to be suitable for to make the polymeric substrates of optics, electronics, micro electronmechanical and electro-optical system and/or device.

In addition, can have electrode on the substrate; Useful binders or binding are bonded in electrode with shell of the present invention---for example, and shown in Fig. 3 and 4; Seal coating puts on electrode surface, also puts on the zone that jointing material is incorporated into outer casing stand electrode material.Electrode material can be any material known in the art; For example, the combination of the gold on gold, copper, silver, nickel, nickel or the copper and similar material or material known in the art.

Figure 13 shows the method that applies the selected surface of two or more self-contained units with sealant or other material simultaneously, and is as described below.For describing, Figure 13 illustrates two devices; Have the device A (numeral 300) of surfaces A-A and A-B and have the device B (numeral 310) of surperficial B-A and B-B, wherein a surface or other zone of preferred each device are not applied by ALD.As shown in figure 13, two devices can be put together, protective layer 320 is inserted between two devices, thereby surfaces A-B of device A is not to apply with the surperficial B-B that installs B in ALD deposition coating step.Can protect the non-limitative example of the not coated material in surface to comprise and place two paper between the surface; Polymeric material: for example polyethylene terephthalate (PET), poly fluorocarbon and chlorofluorocarbon such as teflon ^TM(TEFLON ^TM), polyimides such as Kapton

, PPOX (PPO); With other known suitable material of this area possibility.To unique requirement of coating material is that they are heat-staple under the temperature of implementing ALD technology and they mix in (contaminate) or permanently adhere to protected surface.In case coating procedure finishes, and then removes protective material.With reference to Figure 13, coated surface is 310 and 320, with the edges of 340 expressions with owing to the space between each layer that exists sept or other element 350 to form, material or substrate that described sept or other element 350 will have material or the substrate of surfaces A-A and have surfaces A-B are separated.340 and 350 can be called " edge " altogether.In another embodiment of the invention,, then can as shown in figure 13 protective layer be put on surfaces A-A and B-A if only a side or edge 340 or 350 need to apply.In another embodiment, also can pile up other device, between each device, place protective layer, thereby the multiple arrangement that can obtain to apply simultaneously (for example 3,4 devices, or the like).Generally speaking, said method can be used for applying the selected surface of multiple arrangement, and except that step as herein described, this method also comprises step:

Make at least one a selected surface of protective layer contact first device and a selected surface of second device;

Not with apparatus surface that described protective layer contacts on deposition sealing/coating material; With

Separate described device and remove described protective layer so that the device on the selected surface with coating to be provided.It is particularly useful when side that only needs coating unit and edge to utilize protective layer between each device and the protective layer on top layer and bottom surface (as A-A among Figure 13 and the B-A) to pile up multiple arrangement.It helps to produce and reduce cost.In all execution modes, all can adopt a plurality of coatings or identical or different material.Broad arrow 400 expression ALD precursor flow direction.

Figure 14 A has only shown the device A with surfaces A-A and A-B, and will have material or the substrate of surfaces A-A and have material or the separated sept of substrate or other element 350 of surfaces A-B.In this situation, the ALD sedimentary deposit will apply all surface and edge (airtight sealing district), comprise surfaces A-A and A-B and owing to have sept or element 350 material with surfaces A-A or substrate and have the material of surfaces A-B or substrate between the space that forms.ALD flows and is direction 400.By the coating layer portion in the zone of sept or element 350 representatives or all fill this zone with this device of airtight sealing (seeing Figure 14 B, shadow region 360).Coating can be to have the monolayer material of selected optical signature or one or more materials of multilayer; Such as but not limited to, antireflecting coating or material, introduce the coating or the material of UV and/or IR filter characteristic, introduce the coating or the material of dichroic filter characteristic, introduce the coating or the material of colour filter characteristic (promptly making colour filter) and be suitable for making the coating of laser mirror or material (promptly, manufacturing has the device of UV and IR filter, colour filter, dichroic filter, laser mirror, the device that only has antireflecting coating, and the combination in any of like aforementioned and known in the art/device).The coating of these types also is favourable for using organic material (for example polymer) as the device of substrate.Organic Light Emitting Diode (OLEDs) is exactly an example.When substrate was glass, coating was with all edges of airtight sealing and provide designed optical function for glass surface (one or more).As in the previous paragraph, thus can on a device, place another device and pile up multiple arrangement.

Figure 14 B is the enlarged drawing of Figure 14 A, shows the how zone around the interval between coating thing 350 of sealant or other material 360, and described sept is at the material with surfaces A-A and have between the material of surfaces A-B.If the device of Figure 14 A itself is coated, go up without any protective layer on A-A or A-B or other surface, and then except 350,360 surfaces shown in Figure 14 A, all surface is also all with coated.If apply device shown in Figure 13, then except that zone 350 and other edge, surfaces A-A and B-A are also with coated, unless these surperficial protected seam protections as described herein in deposition process.

Substrate of the present invention can have one or more zones, and each zone comprises complete optics, electronics, micro electronmechanical and/or electro-optical system and/or device, and they are covered description as described herein then separately independently so that they are separated from each other.When substrate comprises a plurality of these type of whens device,, shell surrounded by shell independently thereby having abundant leg to finish on the metacoxal plate device of each in the shell in description.After the description, device treated, that separate and its content that contains are by airtight sealing.

In some embodiments, this method comprises provides sealant, comprises providing being selected from following sealant: SiO ₂, Al ₂O ₃, TiO ₂, ZrO ₂, HfO ₂, Ta ₂O ₅, Nb ₂O ₅, Y ₂O ₃, MgO, CeO ₂, La ₂O ₃, SrTiO ₃, BaTiO ₃With fluorine-containing silicon dioxide, comprise separately or the compound of the aforementioned substances of combination in any/stacked (laminar) layer and multilayer.Described layer and multilayer can be for example parts of AR (antireflecting coating), optical filter layer/multilayer and similar assembly of (many) assemblies.When adopting AR or optical filter layer or multi-layer sealed edge, optionally do not need to cover cover and apply sealant.

The invention still further relates to the method for a kind of optics of making airtight sealing, micro electronmechanical, electronics and electro-optical system and/or device, this method has following steps at least:

Substrate is provided;

Shell is provided, continuous " leg " or extension that it has the top and thickness and length are arranged, described top has first or end face and second or bottom surface, and whole girth or the circumference around described cover top portion extends a segment distance in a direction (seeing Figure 12) from the bottom surface for described " leg " or extension;

Be provided for the shell extension is bonded in the adhesive or the jointing material of described substrate;

The shell extension is bonded in described substrate;

In the device zone of step (4), apply photoresist or other protectiveness or spreadability material, the zone of shell extension and base plate bonding especially, thus prevent these regional sealed coated materials;

Apply this device with selected coating material, thereby between shell and substrate, realize airtight sealing; With

Remove photoresist or other protectiveness material, to be provided at optics, electronics and/or the electrooptical device that has airtight sealing between shell and the substrate.

Though described the present invention with reference to a limited number of execution mode, those skilled in the art will understand after open reading the present invention, can design other execution mode and not depart from the scope of the invention as herein described.Therefore, the scope of the invention only is subjected to the restriction of claims.

Claims

1. the device of an airtight sealing, described device comprises:

Substrate, optics, demonstration, photoelectricity, electronics or micro electronmechanical (" MEMS ") element of having independent or combination in any on it, comprise any electrode or the electric wire that stretch out from described element and/or described substrate, described electrode or electric wire are used in described element and set up the electricity contact with other device that separates or interelement;

Shell, the extension that it has the top and thickness and length are arranged, described top has first or end face and second or bottom surface, and whole girth or the circumference around described cover top portion extends a segment distance in a direction to described extension from described bottom surface;

Adhesive is bonded in described substrate with described shell extension, comprises being bonded in any electrode or the electric wire that stretches out to outdoor independently element or device from described element, and described chamber is limited by the shell that is bonded in substrate; With

Sealant, it comprises that with described shell extension, adhesive and substrate any electrode and/or electric wire contact, with the described indoor optics of airtight sealing, photoelectricity, electronics or microcomputer electric component, and allow electrode and/or electric wire to lead to outdoor independently other device or element from chamber components.

2. device as claimed in claim 1 is characterized in that described sealant is selected from SiO ₂, Al ₂O ₃, TiO ₂, ZrO ₂, HfO ₂, Ta ₂O ₅, Nb ₂O ₅, Y ₂O ₃, MgO, CeO ₂, La ₂O ₃, SrTiO ₃, BaTiO ₃With fluorine-containing silicon dioxide; And the compound/stacked layer of the combination of any aforementioned substances.

3. device as claimed in claim 1 is characterized in that, the top transparent of described shell passes in and out this device to allow light.

4. device as claimed in claim 1 is characterized in that, described shell is for only transparent, opaque or lighttight.

5. device as claimed in claim 1 is characterized in that, described device is described indoor digit optical processing unit with micro mirror group.

6. device as claimed in claim 1 is characterized in that described device is a control device.

7. method of making the airtight sealing device, this method may further comprise the steps:

Substrate is provided, optics, photoelectricity, electronics or micro electronmechanical (" MEMS ") element of having independent or combination in any on it, comprise any electrode or the electric wire that stretch out from described element and/or described substrate, described electrode or electric wire are used in described element and set up the electricity contact with other device that separates or interelement;

Shell is provided, the extension that it has the top and thickness and length are arranged, described top has first or end face and second or bottom surface, and whole girth or the circumference around described cover top portion extends a segment distance in a direction to described extension from described bottom surface;

Adhesive is provided, is used for the shell extension is bonded in described substrate, comprise any electrode or electric wire that the described element that is bonded in from the described substrate stretches out to outdoor independently element or device, described chamber is limited by the shell that is bonded in substrate;

With described adhesive described shell is bonded in described substrate; With

Sealant is provided and described sealant is put on the zone that described adhesive is bonded in described shell extension described substrate, with the described indoor optics of airtight sealing, photoelectricity, electronics or microcomputer electric component, and allow electrode and/or electric wire to lead to outdoor independently other device or element from chamber components.

8. method as claimed in claim 7 is characterized in that, applies described sealant with technique for atomic layer deposition.

9. method as claimed in claim 7 is characterized in that, becomes to assign to apply described sealant with technique for atomic layer deposition with first and second sealants that form sealant and the volatile materials that is removed at the deposition afterreaction.

10. method as claimed in claim 7 is characterized in that providing sealant to comprise provides the sealant of the single or multiple lift that is selected from following material: SiO ₂, Al ₂O ₃, TiO ₂, ZrO ₂, HfO ₂, Ta ₂O ₅, Nb ₂O ₅, Y ₂O ₃, MgO, CeO ₂, La ₂O ₃, SrTiO ₃, BaTiO ₃With fluorine-containing silicon dioxide, comprise the compound/stacked layer and the multilayer of the aforementioned substances of independent or any combination.

11. method as claimed in claim 7, it is characterized in that, described sealant is selected from antireflecting coating, introduce the coating or the material of UV and/or IR filter characteristic, introduce the coating or the material of dichroic filter characteristic, introduce the coating or the material of colour filter characteristic and coating or the material that is suitable for making laser mirror.

12. method as claimed in claim 7 is characterized in that, described method also comprises the selected surface that applies multiple arrangement, and described method comprises:

Protective layer is contacted with at least one a selected surface of first device and a selected surface of second device;

Not with device zone that described protective layer contacts on deposition sealing/coating material; With separate described multiple arrangement and remove described protective layer so that the device on the selected surface with coating to be provided.

13. method as claimed in claim 12 is characterized in that, described device is an oled device.