TWI783346B - Micro-electro mechanical system and manufacturing method thereof - Google Patents
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- B81B2201/00—Specific applications of microelectromechanical systems
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- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
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- G01P2015/0862—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values being provided with particular means being integrated into a MEMS accelerometer structure for providing particular additional functionalities to those of a spring mass system
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- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
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Abstract
Description
本發明實施例係有關微機電系統及其製造方法。 Embodiments of the present invention relate to micro-electro-mechanical systems and manufacturing methods thereof.
最近已開發微機電系統(MEMS)裝置。MEMS裝置包含使用半導體技術製造以形成機械及電特徵之裝置。MEMS裝置實施於壓力感測器、麥克風、致動器、反射鏡、加熱器及/或印表機噴嘴中。儘管用於形成MEMS裝置之既有裝置及方法一般已足以用於其預期目的,但其未在所有方面完全令人滿意。 Microelectromechanical systems (MEMS) devices have recently been developed. MEMS devices include devices fabricated using semiconductor technology to form mechanical and electrical features. MEMS devices are implemented in pressure sensors, microphones, actuators, mirrors, heaters, and/or printer nozzles. While existing apparatus and methods for forming MEMS devices have generally been adequate for their intended purposes, they have not been entirely satisfactory in all respects.
本發明之一實施例係關於一種微機電系統(MEMS),其包括:一電路基板,其包括電子電路;一支撐基板,其具有一凹槽;一接合層,其放置於該電路基板與該支撐基板之間;數個通孔,其等穿過該電路基板而至開口;一第一導電層,其放置於該電路基板之一前側上;一第二導電層,其放置於該凹槽之一內壁上;及一第三導電層,其放置於該等通孔之各者之一內壁上。 One embodiment of the present invention relates to a micro-electro-mechanical system (MEMS), which includes: a circuit substrate including electronic circuits; a support substrate having a groove; a bonding layer disposed between the circuit substrate and the circuit substrate. Between the support substrates; several through holes, which pass through the circuit substrate to the opening; a first conductive layer, which is placed on a front side of the circuit substrate; a second conductive layer, which is placed in the groove on one of the inner walls; and a third conductive layer placed on one of the inner walls of each of the through holes.
本發明之一實施例係關於一種製造一微機電系統(MEMS)之方法,其包括:在一第一基板之一前側上方形成電子電路系統;形成穿 透至該第一基板中之一或多個孔;由一填充材料填充該等孔;薄化該第一基板之一後側以暴露該等填充孔之部分;由一接合層將一第二基板接合至該第一基板之該後側,該接合層插入於該第二基板與該第一基板之該後側之間;及在該第二基板中形成一凹槽以暴露該第一基板之一底部。 One embodiment of the invention relates to a method of fabricating a microelectromechanical system (MEMS), comprising: forming electronic circuitry over a front side of a first substrate; forming through penetrating into one or more holes in the first substrate; filling the holes with a filling material; thinning a rear side of the first substrate to expose portions of the filled holes; bonding a second substrate with a bonding layer a substrate is bonded to the rear side of the first substrate, the bonding layer is interposed between the second substrate and the rear side of the first substrate; and a groove is formed in the second substrate to expose the first substrate one of the bottom.
本發明之一實施例係關於一種製造一微機電系統(MEMS)之方法,其包括:在一第一基板之一前側上方形成電子電路系統;在該第一基板上方形成電極;在除形成該等電極之外的區域處形成穿透至該第一基板中之一或多個孔;由一填充材料填充該等孔;薄化該第一基板之一後側以暴露該等填充孔之部分;由氧化矽製成之一接合層將一第二基板接合至該第一基板之該後側,該接合層插入於該第二基板與該第一基板之該後側之間;分別在該等電極上方形成柱電極;及在該第二基板中形成一凹槽以暴露該第一基板之一底部。 One embodiment of the present invention relates to a method of fabricating a microelectromechanical system (MEMS), comprising: forming electronic circuitry over a front side of a first substrate; forming electrodes over the first substrate; forming the Forming one or more holes penetrating into the first substrate at regions other than the electrodes; filling the holes with a filling material; thinning a rear side of the first substrate to expose portions of the filled holes a bonding layer made of silicon oxide bonds a second substrate to the rear side of the first substrate, the bonding layer being interposed between the second substrate and the rear side of the first substrate; forming post electrodes above the electrodes; and forming a groove in the second substrate to expose a bottom of the first substrate.
10:微機電系統(MEMS)裝置 10: Micro-Electro-Mechanical Systems (MEMS) Devices
10A:MEMS裝置 10A: MEMS device
10B:MEMS裝置 10B: MEMS device
10C:MEMS裝置 10C: MEMS device
10D:MEMS裝置 10D: MEMS device
20:電路基板 20: Circuit board
20':裝置層 20': Installation layer
25:電子電路/電子電路系統/互補式金屬氧化物半導體(CMOS)電路 25: Electronic Circuits/Electronic Circuit Systems/Complementary Metal Oxide Semiconductor (CMOS) Circuits
28:鈍化膜 28: Passivation film
30:支撐基板 30: Support substrate
30':塊體層 30': block layer
35:開口/腔/凹槽 35: Opening/cavity/groove
40:接合層 40: joint layer
40':氧化物層 40': oxide layer
50:第一導電層 50: The first conductive layer
55:第二導電層 55: Second conductive layer
57:第三導電層 57: The third conductive layer
60:通孔 60: Through hole
100:電極 100: electrode
101:電極 101: electrode
110:鈍化層 110: passivation layer
120:穿矽通路(TSV)孔 120:Through silicon via (TSV) hole
130:第一導電層 130: the first conductive layer
140:填充材料層 140: Filling material layer
150:絕緣圖案 150: insulation pattern
160:第一載體接合層 160: first carrier bonding layer
165:第一載體基板 165: the first carrier substrate
170:接合層 170: bonding layer
180:第一硬遮罩層 180: The first hard mask layer
190:第二硬遮罩層 190: second hard mask layer
200:開口 200: opening
210:導電層/第一柱電極 210: conductive layer/first column electrode
215:額外導電層/第二柱電極 215: Additional conductive layer/second column electrode
220:遮罩圖案/光阻圖案 220: Mask pattern/photoresist pattern
225:金屬墊 225: metal pad
230:層間介電層 230: interlayer dielectric layer
242:第一鈍化層 242: first passivation layer
244:第二鈍化層 244: Second passivation layer
246:第三鈍化層 246: The third passivation layer
250:凸塊下墊電極 250: pad electrode under bump
252:第一金屬層/TiW層 252: first metal layer/TiW layer
254:第二金屬層/Cu層 254: Second metal layer/Cu layer
256:第三金屬層/Ni層 256: The third metal layer/Ni layer
258:第四金屬層/Sn層 258: The fourth metal layer/Sn layer
260:球凸塊 260: ball bump
300:第二載體基板 300: second carrier substrate
305:第二載體接合層 305: second carrier bonding layer
310:遮罩圖案 310: mask pattern
320:第二導電層 320: second conductive layer
390:切割道 390: cutting road
400:框架 400: frame
500:電子束 500: electron beam
CR:中心區域 CR: central area
L1:距離 L1: distance
L2:距離 L2: Distance
L3:距離 L3: Distance
PR:周邊區域 PR: Surrounding area
T1:厚度 T1: Thickness
T2:總厚度 T2: total thickness
自結合附圖解讀之以下詳細描述最佳理解本揭示。應強調,根據行業標準做法,各種構件未按比例繪製且僅用於說明。事實上,為使討論清楚,可任意增大或減小各種構件之尺寸。 The present disclosure is best understood from the following detailed description when read in conjunction with the accompanying figures. It should be emphasized that, in accordance with standard industry practice, various components are not drawn to scale and are used for illustration purposes only. In fact, the dimensions of the various components may be arbitrarily increased or decreased for clarity of discussion.
圖1A、圖1B、圖1C及圖1D展示根據本發明之實施例之MEMS裝置之示意性橫截面圖。 1A, 1B, 1C and 1D show schematic cross-sectional views of MEMS devices according to embodiments of the invention.
圖2A、圖2B、圖2C、圖2D、圖2E及圖2F展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。 2A, 2B, 2C, 2D, 2E and 2F show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention.
圖3A、圖3B、圖3C、圖3D及圖3E展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。 3A, 3B, 3C, 3D and 3E show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention.
圖4A、圖4B、圖4C及圖4D展示根據本發明之一實施例之 一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。 Fig. 4A, Fig. 4B, Fig. 4C and Fig. 4D show that according to one embodiment of the present invention Schematic cross-sectional views of various stages of a fabrication operation of a MEMS device.
圖5A、圖5B及圖5C展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。 5A, 5B and 5C show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention.
圖6A、圖6B及圖6C展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。 6A, 6B and 6C show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention.
圖7A展示MEMS裝置之一平面圖且圖7B展示根據本發明之一實施例之一墊結構裝置之一橫截面圖。 Figure 7A shows a plan view of a MEMS device and Figure 7B shows a cross-sectional view of a pad structure device according to one embodiment of the invention.
圖8展示根據本發明之一實施例之MEMS裝置之一使用。 Figure 8 shows one use of a MEMS device according to one embodiment of the invention.
圖9A、圖9B、圖9C及圖9D展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。 9A, 9B, 9C and 9D show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention.
應瞭解,以下揭示提供用於實施本發明之不同特徵之諸多不同實施例或實例。下文將描述組件及配置之特定實施例或實例以簡化本揭示。當然,此等僅為實例且不意在限制。例如,元件之尺寸不受限於所揭示之範圍或值,而是可取決於程序條件及/或裝置之所要性質。此外,在以下描述中,在一第二構件上方或一第二構件上形成一第一構件可包含其中形成直接接觸之該第一構件及該第二構件之實施例,且亦可包含其中可形成插入於該第一構件與該第二構件之額外構件使得該第一構件及該第二構件可不直接接觸之實施例。為簡單及清楚起見,可依不同比例任意繪製各種構件。 It should be appreciated that the following disclosure provides many different embodiments, or examples, for implementing different features of the invention. Specific embodiments or examples of components and configurations are described below to simplify the present disclosure. Of course, these are examples only and are not meant to be limiting. For example, the dimensions of the elements are not limited to the disclosed ranges or values, but may depend on process conditions and/or desired properties of the device. Furthermore, in the following description, forming a first member over or on a second member may include embodiments in which the first member and the second member are formed in direct contact, and may also include embodiments in which a direct contact may be made. An embodiment in which an additional member inserted between the first member and the second member is formed such that the first member and the second member are not in direct contact. Various components may be arbitrarily drawn in different scales for simplicity and clarity.
此外,為便於描述,諸如「下面」、「下方」、「下」、「上方」、「上」及其類似者之空間相對術語在本文中可用於描述一元件或構件與另一(些)元件或構件之關係,如圖中所繪示。除圖中所描繪之定 向之外,空間相對術語亦意欲涵蓋裝置在使用或操作中之不同定向。可依其他方式(旋轉90度或以其他定向)定向設備且亦可因此解譯本文中所使用之空間相對描述詞。另外,術語「由…製成」可意謂「包括」或「由…組成」。在本揭示中,除非另有指示,否則A、B及C之至少一者意謂「A」、「B」、「C」、「A及B」、「A及C」、「B及C」或「A、B及C」且不意謂來自A之一者、來自B之一者及來自C之一者。 In addition, for ease of description, spatially relative terms such as "below", "below", "under", "above", "upper" and the like may be used herein to describe the relationship between an element or component and another(s) The relationship of elements or components, as shown in the figure. Except as depicted in the figure Additionally, spatially relative terms are also intended to encompass different orientations of the device in use or operation. A device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein may be interpreted accordingly. Additionally, the term "consisting of" may mean "comprising" or "consisting of". In this disclosure, unless otherwise indicated, at least one of A, B and C means "A", "B", "C", "A and B", "A and C", "B and C ” or “A, B and C” and does not mean one from A, one from B and one from C.
根據本揭示之MEMS裝置可為以下之任一者:一電子束偏轉器、一電磁束偏轉器、一加速度計、一陀螺儀、一壓力感測器、一麥克風、一RF諧振器、一RF開關或一超音波傳感器。 A MEMS device according to the present disclosure may be any of the following: an electron beam deflector, an electromagnetic beam deflector, an accelerometer, a gyroscope, a pressure sensor, a microphone, an RF resonator, an RF switch or an ultrasonic sensor.
圖1A及圖1B展示根據本發明之實施例之MEMS裝置10A及10B之示意性橫截面圖。
1A and 1B show schematic cross-sectional views of
在一些實施例中,MEMS裝置10A及10B包含其中形成一電子電路25(例如包含半導體場效電晶體之電晶體,諸如互補式金屬氧化物半導體(CMOS)裝置)之一電路基板20及具有用於接收聲音、壓力及/或光之一開口(腔或凹槽)35之一支撐基板30。在一些實施例中,一接合層40形成於電路基板20與支撐基板30之間。在一些實施例中,接合層40係氧化矽層。在一些實施例中,電路基板20包含由電子電路系統形成之電子電路系統25,諸如一信號處理電路及/或一放大器電路。在一些實施例中,凹槽35在平面圖中具有一矩形(例如正方形)形狀。在一些實施例中,電路基板20及支撐基板30之至少一者由一結晶矽製成。在一些實施例中,如圖1A中所展示,接合層保留於凹槽35之底部處,且在其他實施例中,如圖1B中所展示,接合層不存在於凹槽35之底部處。
In some embodiments,
此外,在一些實施例中,一第一導電層50形成於電路基板
20之一前表面上,且一第二導電層55形成於支撐基板30之一後表面上,如圖1A及圖1B中所展示。在一些實施例中,如圖1A中所展示,接合層40與第二導電層55接觸且不與電路基板20接觸。在其他實施例中,第二導電層55與電路基板20接觸,如圖1B中所展示。在一些實施例中,第一導電層及第二導電層包含Au、Ti、Cu、Ag及Ni之一或多個層。
In addition, in some embodiments, a first
在一些實施例中,電路基板20之底部處之凹槽35之大小之距離L1在自約10mm至約50mm之一範圍內,且在其他實施例中在自約15mm至約20mm之一範圍內。在一些實施例中,支撐基板30之底部處之腔35之大小之距離L2大於L1且在自約11mm至約52mm之一範圍內且在其他實施例中在自約16mm至約22mm之一範圍內。在一些實施例中,自MEMS裝置之邊緣至電路基板20之底部處之凹槽35之邊緣之距離L3(一框架部分之一寬度)在自約2μm至約10μm之一範圍內,且在其他實施例中在自約3μm至約5μm之一範圍內。在一些實施例中,接合層40之厚度T1在自約200nm至約5μm之一範圍內,且在其他實施例中在自約500nm至約2μm之一範圍內。在一些實施例中,MEMS裝置之總厚度T2在自約300μm至約2mm之一範圍內,且在其他實施例中在自約600μm至約800μm之一範圍內。
In some embodiments, the distance L1 of the size of the
圖1C及圖1D展示根據本發明之實施例之MEMS裝置10C及10D之示意性橫截面圖。在一些實施例中,MEMS裝置10C及10D係一或多個電子或極紫外(EUV)光束由其藉由嵌入於MEMS裝置中之一電子電路之操作來偏轉之一光束偏轉器。
1C and ID show schematic cross-sectional views of
類似於MEMS裝置10A及10B,MEMS裝置10C及10D包含其中形成一電子電路25之一電路基板20及具有用於接收聲音、壓力及/或
光之一開口(腔或凹槽)35之一支撐基板30。在一些實施例中,一接合層40形成於電路基板20與支撐基板30之間。在一些實施例中,接合層40係氧化矽層。在一些實施例中,放置穿過電路基板20及接合層40之一或多個通孔60,使得光束穿過通孔60。在一些實施例中,通孔60在一平面圖中配置成一n×m矩陣,其中n及m係2或更大且等於或小於(例如)128之整數。
Similar to
在一些實施例中,一第一導電層50形成於電路基板20之一前表面上,且一第二導電層55形成於支撐基板30之一後表面上,如圖1C及圖1D中所展示。在一些實施例中,如圖1C中所展示,接合層40與第二導電層55接觸且不與電路基板20接觸。在其他實施例中,第二導電層55與電路基板20接觸,如圖1D中所展示。此外,一第三導電層57放置於通孔60之各者之一內壁上以連接第一導電層50及第二導電層55。
In some embodiments, a first
在一些實施例中,電路基板20包含由電子電路系統形成之電子電路系統25,諸如一信號處理電路及/或一放大器電路。在一些實施例中,電子電路系統耦合至第一導電層、第二導電層及/或第三導電層以控制通孔60之各者中之第三導電層之電位以藉此偏轉穿過通孔60之光束。
In some embodiments, the
在一些實施例中,凹槽35在平面圖中具有一矩形(例如正方形)形狀。在一些實施例中,電路基板20及支撐基板30之至少一者由一結晶矽製成。在一些實施例中,如圖1C中所展示,接合層保留於凹槽35之底部處,且在其他實施例中,如圖1D中所展示,接合層不存在於凹槽35之底部處。
In some embodiments, the
MEMS裝置10C及10D之L1、L2及L3之尺寸相同或類似於
MEMS裝置10A及10B之L1、L2及L3之尺寸。
The dimensions of L1, L2 and L3 of
圖2A、圖2B、圖2C、圖2D、圖2E及圖2F展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。應瞭解,可在由圖2A至圖2F展示之程序之前、該等程序期間及該等程序之後提供額外操作,且可針對方法之額外實施例來替換或消除下文將描述之一些操作。操作/程序之順序可互換。相對於圖1A至圖1D所描述之材料、組態、尺寸及程序可應用於以下實施例且可省略其詳細描述。 2A, 2B, 2C, 2D, 2E and 2F show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention. It should be appreciated that additional operations may be provided before, during, and after the procedures shown by FIGS. 2A-2F , and that some of the operations described below may be replaced or eliminated for additional embodiments of the method. The order of operations/procedures may be interchanged. The materials, configurations, dimensions, and procedures described with respect to FIGS. 1A-1D are applicable to the following embodiments and detailed descriptions thereof may be omitted.
如圖2A中所展示,在電路基板20之一前表面區域中形成一CMOS(互補式金屬氧化物半導體)電路25。在電路基板之前表面上方形成一或多個鈍化膜28。在一些實施例中,一或多個鈍化膜28包含氧化矽、氮化矽或一有機膜。接著,如圖2B中所展示,由一研磨或拋光程序薄化電路基板20之後側。在一些實施例中,經薄化電路基板20之剩餘厚度在自約100μm至約500μm之一範圍內。
As shown in FIG. 2A , a CMOS (Complementary Metal Oxide Semiconductor)
接著,如圖2C及圖2D中所展示,經由一接合層40來將經薄化電路基板20接合至一支撐基板30。在一些實施例中,如圖2C中所展示,接合層40係由(例如)一熱氧化程序或一化學汽相沈積(CVD)程序形成於支撐基板30之表面上之氧化矽。在其他實施例中,由(例如)一CVD程序在電路基板20之後側上形成接合層40。
Next, as shown in FIGS. 2C and 2D , the thinned
接著,藉由使用一或多個微影及蝕刻操作來使支撐基板30之後側凹進。在一些實施例中,蝕刻操作包含電漿乾式蝕刻或濕式蝕刻。在一些實施例中,濕式蝕刻利用氫氧化四甲基銨(TMAH)或KOH溶液。
Next, the rear side of the
在一些實施例中,接合層40充當用於形成凹槽35之一蝕刻停止層,如圖2E中所展示。在一些實施例中,在支撐基板30之後側及接
合層40上形成一或多個導電層。
In some embodiments,
在其他實施例中,在凹槽蝕刻停止於接合層40處之後,由一或多個乾式蝕刻或濕式蝕刻操作進一步蝕刻接合層40。在一些實施例中,在支撐基板30之後側上形成一或多個導電層。在其他實施例中,如圖2F中所展示,在移除接合層40之後,蝕刻電路基板20之後側之一部分且接著形成一或多個導電層。
In other embodiments, the
圖3A至圖7B展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。應瞭解,可在由圖3A至圖7B展示之程序之前、該等程序期間及該等程序之後提供額外操作,且針對方法之額外實施例來替換或消除下文將描述之一些操作。操作/程序之順序可互換。相對於圖1A至圖1D及圖2A至圖2F所描述之材料、組態、尺寸及程序可應用於以下實施例且可省略其詳細描述。 3A-7B show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention. It should be appreciated that additional operations may be provided before, during, and after the procedures shown by FIGS. 3A-7B , and that some of the operations described below may be replaced or eliminated for additional embodiments of the method. The order of operations/procedures may be interchanged. The materials, configurations, dimensions, and procedures described with respect to FIGS. 1A-1D and 2A-2F are applicable to the following embodiments and detailed descriptions thereof may be omitted.
如圖3A中所展示,在一電路基板20上方形成電子電路之後,形成一或多個平面電極100及電極101且形成一或多個鈍化層110。電極100及電極101電連接至形成於電路基板20中之電子電路。在一些實施例中,電路基板20包含一結晶矽基板。在一些實施例中,在一或多個鈍化層中之電極100及電極101上方形成一或多個開口。在一些實施例中,電極100及電極101由Cu、Al、Au、Ni、Ag或其他適合導電材料之一或多個層製成。鈍化層110包含氮化矽、SiON、氧化矽、氮化鋁或一有機材料。
As shown in FIG. 3A , after forming electronic circuitry over a
接著,在除電極100及電極101之外的區域中形成用於穿矽通路(TSV)之一或多個孔120。由一或多個微影及蝕刻操作形成TSV孔120。在一些實施例中,TSV孔120在一平面圖中配置成一n×m矩陣(參閱圖7A),其中n及m係2或更大且等於或小於(例如)128之整數。在一些實
施例中,自鈍化層110之頂部之TSV之深度在自約20μm至約100μm之一範圍內。在一些實施例中,深度經判定使得在隨後執行電路基板之後側之一薄化程序之後,暴露TSV孔120之底部。在一些實施例中,TSV孔120在平面圖中之形狀呈圓形或矩形(例如正方形)。在一些實施例中,TSV孔120呈錐形以具有大於底部之一開口。在一些實施例中,TSV孔120在開口處之一直徑(或邊之一長度)在自約100nm至約12,000nm之一範圍內。
Next, one or
接著,在電極100及電極101、鈍化層110上方及TSV孔120內側形成一第一導電層130。接著,形成一填充層140以填充TSV孔120,如圖3B中所展示。第一導電層130具有相同或類似於圖1A至圖1D中所展示之第一導電層50之功能。在一些實施例中,第一導電層130包含Au、Ti、Cu、Ag及Ni之一或多個層。在特定實施例中,形成於一Ti層上方之一金層用作第一導電層130。在一些實施例中,Ti層之厚度在自約50nm至約500nm之一範圍內,且在其他實施例中在自約80nm至約300nm之一範圍內。在一些實施例中,金(Au)層之厚度在自約10nm至約10,000nm之一範圍內,且在其他實施例中在自約150nm至約250nm之一範圍內。在一些實施例中,填充層140包含氧化矽或任何其他適合絕緣材料。在一些實施例中,在第一導電層130上方形成一填充材料之一毯覆層,且接著執行諸如一化學機械拋光程序或一回蝕程序之一平坦化操作以使填充材料僅留在TSV孔120內側,如圖3B中所展示。在其他實施例中,填充材料亦保留於電極100及電極101之一凹陷部分上。
Next, a first
接著,如圖3C中所展示,圖案化導電層130以在TSV孔120附近之鈍化層110上方形成一或多個開口以部分暴露鈍化層。接著,形成及圖案化一絕緣層以形成用於覆蓋開口之島狀絕緣圖案150。在一些實施
例中,絕緣圖案150包含氮化矽。
Next, as shown in FIG. 3C , the
此外,如圖3D中所展示,在其上形成導電層130及圖案150之電路基板20之前表面上方形成一第一載體接合層160,且接著附接一第一載體基板165。在一些實施例中,第一載體基板165係一玻璃基板、一陶瓷基板、一半導體基板或一樹脂基板。在一些實施例中,第一載體接合層160包含一有機材料、氧化矽或任何其他適合材料。
Furthermore, as shown in FIG. 3D , a first
接著,由一研磨或拋光(例如CMP)操作薄化電路基板20之後側。在一些實施例中,在薄化之後,電路基板20具有自約20μm至約300μm之一範圍內之一剩餘厚度,且在其他實施例中,剩餘厚度在自約40μm至約180μm之一範圍內。如圖3D中所展示,暴露填充於TSV孔120中之填充材料層140之底部。在其他實施例中,在薄化操作之後,將第一載體基板165附接至電路基板20之前表面。
Next, the rear side of the
此外,如圖3E中所展示,在電路基板20之經薄化後表面上形成一接合層170。接合層170具有相同或類似於圖1A至圖2F中所展示之接合層40之功能。在一些實施例中,接合層170包含由(例如)一CVD程序形成之氧化矽。
In addition, as shown in FIG. 3E , a
接著,如圖4A中所展示,製備一支撐基板30且透過接合層170來將支撐基板30接合至電路基板20(氧化物熔合接合)。在一些實施例中,支撐基板30由一結晶矽製成。在氧化物熔合接合之後,移除第一載體基板165及第一載體接合層160,如圖4B中所展示。如圖4A所展示,接合層170連接至TSV孔120中之填充材料層140。在一些實施例中,接合層170及填充材料層140由相同材料製成。
Next, as shown in FIG. 4A , a
在其他實施例中,在支撐基板30或支撐基板30及電路基板
20兩者上形成接合層170。在一些實施例中,無接合層之支撐基板30之厚度在自約200μm至約1.8mm之一範圍內,且在其他實施例中在自約500μm至約750μm之一範圍內。
In other embodiments, the
接著,如圖4C中所展示,在電路基板20之前表面上方形成一第一硬遮罩層180且接著形成一第二硬遮罩層190。在一些實施例中,第一硬遮罩層180包含氧化矽且第二硬遮罩層190包含多晶矽或非晶矽。在一些實施例中,由一CVD程序形成氧化矽硬遮罩層180,且接著執行諸如一CMP操作之一平坦化操作。類似地,在一些實施例中,由化學汽相沈積(CVD)形成多晶矽硬遮罩層190,且接著視情況執行一CMP操作。在一些實施例中,多晶矽硬遮罩層190之厚度在自約30μm至約70μm之一範圍內。
Next, as shown in FIG. 4C , a first
接著,藉由使用一或多微影及蝕刻操作來圖案化第二硬遮罩層190及第一硬遮罩層180以形成電極100及電極101上方之一或多個開口200,如圖4D中所展示。在一些實施例中,開口200之大小大於形成於電極100及電極101上方之鈍化層110中之開口之大小。此外,在一些實施例中,絕緣圖案150部分暴露於開口200中,如圖4D中所展示。
Next, the second
接著,如圖5A中所展示,在開口200中形成一或多個導電層210(柱電極)。在一些實施例中,導電層包含由一鍍覆操作(電鍍或無電鍍覆)形成之金或金合金(例如AuCu及AuNi)。在一些實施例中,鍍覆導電層210之厚度在自約20μm至約50μm之一範圍內。在一些實施例中,鍍覆導電層210之厚度(高度)小於第二硬遮罩層190之頂部,如圖5A中所展示。
Next, as shown in FIG. 5A , one or more conductive layers 210 (pillar electrodes) are formed in the
此外,如圖5B中所展示,由一遮罩圖案220覆蓋一或多個
電極100及電極101上方之鍍覆層210之部分。在一些實施例中,遮罩圖案220包含一光阻圖案。接著,在導電鍍覆層210上方形成一額外導電層215(柱電極)。在一些實施例中,由一鍍覆操作(電鍍或無電鍍覆)形成額外導電層215。在一些實施例中,額外導電層215由相同於鍍覆導電層210之材料製成且包含金或金合金(例如AuCu、AuNi)。在其他實施例中,額外導電層215由不同於鍍覆導電層210之一材料製成。接著,移除光阻圖案220,如圖5C中所展示。
In addition, as shown in FIG. 5B, one or more
Part of the
在一些實施例中,額外導電層215之厚度在自約10μm至約35μm之一範圍內。在一些實施例中,鍍覆導電層210及額外導電層215之總厚度(高度)小於第二硬遮罩層190之頂部,如圖5C中所展示。在一些實施例中,鍍覆導電層210/215之兩個不同厚度(高度)控制不同電路系統。例如,較高者用於庇護電子,且較低者用於控制電場。
In some embodiments, the thickness of the additional
接著,如圖6A中所展示,在電路基板20之前側上方形成一第二載體接合層305,且接著經由第二載體接合層305來將一第二載體基板300附接至電路基板20之前側。在一些實施例中,第二載體基板300係一玻璃基板、一陶瓷基板、一半導體基板或一樹脂基板。在一些實施例中,第二載體接合層305包含一有機材料、氧化矽或任何其他適合材料。
Next, as shown in FIG. 6A, a second
接著,垂直翻轉整個基板,且接著圖案化支撐基板30之後側以形成一凹槽35。在一些實施例中,由一或多個微影及蝕刻操作使用一遮罩圖案310來形成凹槽35。在一些實施例中,遮罩圖案310由一光阻劑製成。
Then, the entire substrate is turned vertically, and then the rear side of the supporting
在一些實施例中,蝕刻操作包含電漿乾式蝕刻或濕式蝕刻。在一些實施例中,接合層170充當用於形成凹槽35之一蝕刻停止層。
當使用一電漿乾式蝕刻程序來形成凹槽35時,電漿蝕刻實質上停止於接合層170處,且因此可防止形成於電路基板20中之電子電路上之電漿損壞。
In some embodiments, the etching operation includes plasma dry etching or wet etching. In some embodiments,
在一些實施例中,在凹槽蝕刻停止於接合層170處之後,由一或多個乾式蝕刻或濕式蝕刻操作進一步蝕刻接合層170。在一些實施例中,接合層之蝕刻具有相對於電路基板20(例如Si)之一高選擇性。例如,接合層之蝕刻速率係電路基板20之蝕刻速率之10倍或更大。在一些實施例中,當接合層170由氧化矽製成時,執行使用HF或緩衝HF之一濕式蝕刻程序以抑制形成於電路基板20中之電子電路受損。當填充材料層140由相同於接合層170之材料(例如氧化矽)製成時,在移除接合層170時亦移除TSV孔120中之填充材料層140。當填充材料層140由不同於接合層170之一材料(例如氮化矽)製成時,執行諸如一濕式蝕刻操作之一額外蝕刻操作以移除填充材料層140。
In some embodiments, after the recess etch stops at the
在自TSV孔120移除填充材料層140之後,在凹槽35內側形成一第二導電層320,如圖6B中所展示。
After removing the filling
在一些實施例中,如圖6B中所展示,形成與形成於TSV孔120之各者之內壁上之第一導電層130接觸之第二導電層320。在一些實施例中,亦在其中已形成第一導電層130之TSV孔120之內壁上形成第二導電層320。在一些實施例中,第二導電層320由相同於或不同於第一導電層130之材料製成且包含Au、Ti、Cu、Ag及Ni之一或多個層。在特定實施例中,形成於一Ti層上方之一金層用作第二導電層320。在一些實施例中,Ti層之厚度在自約50nm至約200nm之一範圍內,且在其他實施例中在自約80nm至約120nm之一範圍內。在一些實施例中,金(Au)層之厚度在自約10nm至約400nm之一範圍內,且在其他實施例中在自約150nm
至約250nm之一範圍內。
In some embodiments, as shown in FIG. 6B , a second
在一些實施例中,在一Si晶圓上形成複數個MEMS裝置,且藉由在切割道390處鋸切(一切割操作)來將晶圓切割成個別MEMS裝置(晶片)。在一些實施例中,切割操作不完全切割支撐第二載體接合層305,如圖6B中所展示。藉由移除第二載體接合層305且因此移除第二載體基板300來釋放個別MEMS裝置。
In some embodiments, MEMS devices are formed on a Si wafer, and the wafer is diced into individual MEMS devices (wafers) by sawing at dicing streets 390 (a dicing operation). In some embodiments, the cutting operation does not completely cut the supporting second
在一些實施例中,在形成第二導電層320之後執行切割操作。在此一情況中,不在MEMS裝置之側面(切割面)上形成導電層。在其他實施例中,在形成第二導電層320之前執行切割操作。在此一情況中,亦在MEMS裝置之側面處形成第二導電層320。
In some embodiments, the cutting operation is performed after forming the second
在一些實施例中,在移除第二載體基板300及第二載體接合層305之後,將個別MEMS裝置附接於一框架400上,如圖6C中所展示。如圖6C中所展示,藉由移除第二載體基板300及第二載體接合層305來暴露TSV孔120,使得一電子束或一光線可穿過。
In some embodiments, after removing the
圖7A展示MEMS裝置之一平面圖,且圖7B展示周邊區域PR處之一接合墊結構之一橫截面圖。如圖7A之平面圖中所展示,MEMS裝置具有一中心區域CR及包圍中心區域之一周邊區域PR 。TSV孔120及導電層210/215放置於中心區域CR中。在周邊區域PR中,形成一或多個凸塊下墊電極250以將形成於電路基板20中之電子電路連接至MEMS裝置外部之一或多個電路。在一些實施例中,周邊區域PR在平面圖中不與凹槽35重疊。在其他實施例中,周邊區域PR在平面圖中與凹槽35部分重疊。
FIG. 7A shows a plan view of a MEMS device, and FIG. 7B shows a cross-sectional view of a bonding pad structure at the peripheral region PR. As shown in the plan view of FIG. 7A, the MEMS device has a central region CR and a peripheral region PR surrounding the central region. TSV holes 120 and
凸塊下墊電極250形成於電路基板20之前側上。在一些實
施例中,凸塊下墊電極250在周邊區域PR中配置成一矩陣。在一些實施例中,一球凸塊260放置於凸塊下墊電極250之各者上。在一些實施例中,在凹槽蝕刻(如圖6A中所展示)之前形成凸塊下墊電極250。在一些實施例中,在經由氧化物熔合接合來將支撐基板30附接至電路基板20(如圖4A及圖4B中所展示)之後形成凸塊下墊電極250。
The under-
在一些實施例中,凸塊下墊電極250形成於一金屬墊225上,金屬墊225嵌入於一層間介電層230中且由電子電路之最上金屬層(例如第8金屬層級至第12金屬層級)形成。在一些實施例中,金屬墊225包含導電材料之一或多個層。在一些實施例中,金屬墊225包含Cu或Cu合金。
In some embodiments, the under-
此外,如圖7B中所展示,凸塊下墊電極250包含導電材料之多個層。在一些實施例中,凸塊下墊電極250包含一第一金屬層252、一第二金屬層254、一第三金屬層256及一第四金屬層258。在一些實施例中,第一金屬層係一TiW層,第二金屬層係一Cu層,第三金屬層係一Ni層,且第四金屬層係一Sn層。
Furthermore, as shown in FIG. 7B , the under-
在一些實施例中,TiW層252之厚度在自約50nm至約1000nm之一範圍內,且在其他實施例中在自約100nm至約500nm之一範圍內。在一些實施例中,Cu層254之厚度在自約10nm至約2000nm之一範圍內,且在其他實施例中在自約500nm至約1000nm之一範圍內。在一些實施例中,Ni層256之厚度在自約1000nm至約5000nm之一範圍內,且在其他實施例中在自約2500nm至約3500nm之一範圍內。在一些實施例中,Sn層258之厚度在自約500nm至約4000nm之一範圍內,且在其他實施例中在自約1500nm至約2500nm之一範圍內。金屬層由CVD、物理汽相沈積(PVD)(其包含濺鍍、鍍覆或任何其他適合膜形成方法)及微影及蝕
刻操作之一或多者形成。
In some embodiments, the thickness of
在一些實施例中,電子電路之表面由一或多個鈍化層覆蓋。在一些實施例中,鈍化層包含一第一鈍化層242、一第二鈍化層244及一第三鈍化層246。凸塊下墊電極250形成於鈍化層中所形成之一開口中,如圖7B中所展示。在一些實施例中,第一鈍化層242係SiC層,第二鈍化層244係氧化矽層,且第三鈍化層246係氮化矽層。
In some embodiments, the surface of the electronic circuit is covered by one or more passivation layers. In some embodiments, the passivation layer includes a
圖8展示根據本發明之一實施例之MEMS裝置之一使用。在一些實施例中,MEMS裝置10用於一電子或一電磁波微影。在一些實施例中,使電子束(或EUV線)500自電路基板20之前側輸入至MEMS裝置10。形成於電路基板20中之電子電路獨立控制施加於形成於TSV孔120之各者之內壁上之導電層(例如第一導電層130)之電壓。藉由調整施加於TSV孔120中之導電層之電壓,電子束500之一部分穿過TSV孔之一或多者且電子束500之一部分不穿過TSV孔。將穿過TSV孔之電子束之部分導引至其上形成一光阻層之一晶圓或一基板。在一些實施例中,晶圓係一半導體晶圓。在一些實施例中,基板用於一光遮罩,諸如一透明基板或一反射基板。藉由控制電子電路來控制使電子束穿過之TSV孔120之位置,且因此可在光阻圖案上繪製一所要形狀。
Figure 8 shows one use of a MEMS device according to one embodiment of the invention. In some embodiments, MEMS device 10 is used in an electron or an electromagnetic lithography. In some embodiments, the electron beam (or EUV line) 500 is input to the MEMS device 10 from the front side of the
在其他實施例中,使用一絕緣體上矽(SOI)晶圓。在此一情況中,省略一熔合接合程序,且一SOI晶圓之氧化物層充當凹槽蝕刻中之一蝕刻停止層。圖9A、圖9B、圖9C及圖9D展示根據本發明之一實施例之一MEMS裝置之一製造操作之各種階段之示意性橫截面圖。應瞭解,可在由圖9A至圖9D展示之程序之前、該等程序期間及該等程序之後提供額外操作,且可針對方法之額外實施例來替換或消除下文將描述之一些操 作。操作/程序之順序可互換。相對於圖1A至圖7B所描述之材料、組態、尺寸及程序可應用於以下實施例且可省略其詳細描述。 In other embodiments, a silicon-on-insulator (SOI) wafer is used. In this case, a fusion bonding procedure is omitted, and the oxide layer of an SOI wafer acts as an etch stop layer in the recess etch. 9A, 9B, 9C and 9D show schematic cross-sectional views of various stages of a fabrication operation of a MEMS device according to an embodiment of the invention. It should be appreciated that additional operations may be provided before, during, and after the procedures shown by FIGS. 9A-9D , and that some of the operations described below may be replaced or eliminated for additional embodiments of the method. do. The order of operations/procedures may be interchanged. The materials, configurations, dimensions, and procedures described with respect to FIGS. 1A-7B are applicable to the following embodiments and detailed descriptions thereof may be omitted.
SOI基板包含一裝置層(半導體層)20'、氧化物層40'及一塊體層(半導體基板)30',如圖9A中所展示。 The SOI substrate includes a device layer (semiconductor layer) 20', an oxide layer 40' and a bulk layer (semiconductor substrate) 30', as shown in FIG. 9A.
如圖9A中所展示,在裝置層20'之一前表面區域中形成一CMOS電路25。在裝置層20'之前表面上方形成一或多個鈍化膜28。在一些實施例中,一或多個鈍化膜28包含氧化矽、氮化矽或一有機膜。在一些實施例中,形成穿過裝置層20'之由一填充材料140填充之TSV孔120。此外,在裝置層之前側上及TSV孔中形成一或多個第一導電層50,如圖9A中所展示。
As shown in FIG. 9A, a
接著,如圖9B中所展示,藉由使用一或多個微影及蝕刻操作來使塊體層30'之後側凹進。在一些實施例中,蝕刻操作包含電漿乾式蝕刻或濕式實例。在一些實施例中,濕式蝕刻利用氫氧化四甲基銨(TMAH)或KOH溶液。 Next, as shown in FIG. 9B, the rear side of the bulk layer 30' is recessed by using one or more lithography and etching operations. In some embodiments, the etching operation includes plasma dry etching or wet etching. In some embodiments, the wet etch utilizes tetramethylammonium hydroxide (TMAH) or KOH solutions.
在一些實施例中,氧化物層40'充當用於形成凹槽35之一蝕刻停止層,如圖9B中所展示。
In some embodiments, oxide layer 40' acts as an etch stop for forming
在凹槽蝕刻停止於氧化物層40'處之後,由一或多個乾式蝕刻或濕式蝕刻操作進一步蝕刻氧化物層40'。在蝕刻氧化物層40'期間,亦自TSV孔120移除填充材料層140,如圖9C中所展示。
After the recess etch stops at the oxide layer 40', the oxide layer 40' is further etched by one or more dry etch or wet etch operations. During etching of oxide layer 40', fill
在一些實施例中,在塊體層30'之後側上形成一或多個第二導電層55,如圖9D中所展示。
In some embodiments, one or more second
在本發明之實施例中,藉由經由氧化物熔合接合之氧化矽接合層或使用一SOI基板接合一電路基板及一支撐基板來形成一MEMS裝 置。當蝕刻支撐基板以形成一凹槽時,氧化物接合層(氧化物層)亦充當用於一電漿乾式蝕刻之一蝕刻停止層,且因此保護形成於電路基板中之電子電路系統免受由電漿蝕刻引起之損壞。因為氧化矽接合層可由濕式蝕刻操作移除,所以氧化矽接合層之移除程序不引起形成於電路基板中之電子電路系統受損。 In an embodiment of the present invention, a MEMS device is formed by bonding a silicon oxide bonding layer through oxide fusion bonding or using an SOI substrate to bond a circuit substrate and a support substrate. place. The oxide bonding layer (oxide layer) also acts as an etch stop layer for a plasma dry etch when the support substrate is etched to form a recess, and thus protects the electronic circuitry formed in the circuit substrate from being damaged by Damage caused by plasma etching. Since the silicon oxide bonding layer can be removed by a wet etching operation, the removal process of the silicon oxide bonding layer does not cause damage to the electronic circuitry formed in the circuit substrate.
本文中所描述之各種實施例或實例提供相較於既有技術之若干優點,如上文所闡述。應瞭解,本文中未必討論所有優點,非所有實施例或實例需要特定優點,且其他實施例或實例可提供不同優點。 The various embodiments or examples described herein offer several advantages over the prior art, as set forth above. It should be appreciated that not all advantages are necessarily discussed herein, that not all embodiments or examples require a particular advantage, and that other embodiments or examples may provide different advantages.
根據本發明之一態樣,一種微機電系統(MEMS)包含:一電路基板,其包括電子電路系統;一支撐基板,其具有一凹槽;一接合層,其放置於該電路基板與該支撐基板之間;數個通孔,其等穿過該電路基板而至開口;一第一導電層,其放置於該電路基板之一前側上;一第二導電層,其放置於該凹槽之一內壁上;及一第三導電層,其放置於該等通孔之各者之一內壁上。在上述及以下實施例之一或多者中,該接合層包含氧化矽。在上述及以下實施例之一或多者中,在該凹槽中,不放置接合層且該電路基板之一底部與該第二導電層接觸。在上述及以下實施例之一或多者中,該電路基板包含具有不同組態之電極。在上述及以下實施例之一或多者中,該等電極包含其等之各者上放置一第一柱電極之第一電極及其等之各者上放置一第二柱電極之第二電極,且該第一柱電極之一高度不同於該第二柱電極之一高度。在上述及以下實施例之一或多者中,該第一柱電極與該第二柱電極之間的一高度差在自10μm至30μm之一範圍內。在上述及以下實施例之一或多者中,在平面圖中,該電路基板包括其中提供該等通孔之一中心區域及包圍該中心區域之一周邊區域,且具有不同於該 電極之組態之複數個凸塊下墊電極放置於該周邊區域中。在上述及以下實施例之一或多者中,該周邊區域在平面圖中不與該凹槽重疊。 According to an aspect of the present invention, a micro-electromechanical system (MEMS) includes: a circuit substrate, which includes an electronic circuit system; a support substrate, which has a groove; a bonding layer, which is placed between the circuit substrate and the support Between the substrates; several through holes, which pass through the circuit substrate to the opening; a first conductive layer, which is placed on a front side of the circuit substrate; a second conductive layer, which is placed on the groove on an inner wall; and a third conductive layer disposed on an inner wall of each of the through holes. In one or more of the above and following embodiments, the bonding layer includes silicon oxide. In one or more of the above and following embodiments, no bonding layer is placed in the groove and a bottom of the circuit substrate is in contact with the second conductive layer. In one or more of the above and following embodiments, the circuit substrate includes electrodes having different configurations. In one or more of the above and following embodiments, the electrodes include a first electrode on each of which places a first pillar electrode and each of which places a second electrode on which a second pillar electrode , and a height of the first pillar electrode is different from a height of the second pillar electrode. In one or more of the above and following embodiments, a height difference between the first pillar electrode and the second pillar electrode is in a range from 10 μm to 30 μm. In one or more of the above and following embodiments, in plan view, the circuit substrate includes a central area in which the through holes are provided and a peripheral area surrounding the central area, and has a shape different from the A plurality of under-bump electrodes of the electrode configuration are placed in the peripheral area. In one or more of the above and following embodiments, the peripheral region does not overlap the groove in plan view.
根據本發明之另一態樣,在一種製造一微機電系統(MEMS)之方法中,在一第一基板之一前側上方形成電子電路系統,形成穿透至該第一基板中之一或多個孔,由一填充材料填充該等孔,薄化該第一基板之一後側以暴露該等填充孔之部分,由一接合層將一第二基板接合至該第一基板之該後側,該接合層插入於該第二基板與該第一基板之該後側之間,且在該第二基板中形成一凹槽以暴露該第一基板之一底部。在上述及以下實施例之一或多者中,該接合層係氧化矽。在上述及以下實施例之一或多者中,在該第一基板之該後側上形成該接合層。在上述及以下實施例之一或多者中,在該第二基板上形成該接合層。在上述及以下實施例之一或多者中,當形成該凹槽時,藉由電漿乾式蝕刻來蝕刻該第二基板之一部分以暴露該接合層但不蝕刻該第一基板,且藉由一蝕刻來蝕刻該接合層,該蝕刻自該第一基板選擇性移除該接合層。在上述及以下實施例之一或多者中,在蝕刻該接合層時,亦自該等孔移除該填充材料以藉此形成通孔。在上述及以下實施例之一或多者中,在該第一基板之該前側上方及該等孔之各者之內壁上形成一第一導電層,且在該凹槽之一內壁上方形成一第二導電層。在上述及以下實施例之一或多者中,該第一導電層及該第二導電層之至少一者係一Ti層上一Au層之一堆疊層。在上述及以下實施例之一或多者中,該等孔在平面圖中配置成一矩陣。 According to another aspect of the invention, in a method of fabricating a microelectromechanical system (MEMS), electronic circuitry is formed over a front side of a first substrate, forming one or more holes, filling the holes with a filling material, thinning a rear side of the first substrate to expose portions of the filled holes, bonding a second substrate to the rear side of the first substrate by a bonding layer , the bonding layer is interposed between the second substrate and the rear side of the first substrate, and a groove is formed in the second substrate to expose a bottom of the first substrate. In one or more of the above and following embodiments, the bonding layer is silicon oxide. In one or more of the above and following embodiments, the bonding layer is formed on the rear side of the first substrate. In one or more of the above and following embodiments, the bonding layer is formed on the second substrate. In one or more of the above and following embodiments, when forming the groove, a portion of the second substrate is etched by plasma dry etching to expose the bonding layer but the first substrate is not etched, and by An etch to etch the bonding layer selectively removes the bonding layer from the first substrate. In one or more of the above and following embodiments, when etching the bonding layer, the fill material is also removed from the holes to thereby form vias. In one or more of the above and following embodiments, a first conductive layer is formed over the front side of the first substrate and on the inner walls of each of the holes, and over an inner wall of the groove A second conductive layer is formed. In one or more of the above and following embodiments, at least one of the first conductive layer and the second conductive layer is a stacked layer of an Au layer on a Ti layer. In one or more of the above and below embodiments, the holes are arranged in a matrix in plan view.
根據本發明之另一態樣,在一種製造一微機電系統(MEMS)之方法中,在一第一基板之一前側上方形成電子電路系統,在該第一基板上方形成電極,在除形成該等電極之外的區域處形成穿透至該第 一基板中之一或多個孔,由一填充材料填充該等孔,薄化該第一基板之一後側以暴露該等填充孔之部分,由氧化矽製成之一接合層將一第二基板接合至該第一基板之該後側,該接合層插入於該第二基板與該第一基板之該後側之間,分別在該等電極上方形成柱電極,且在該第二基板中形成一凹槽以暴露該第一基板之一底部。在上述及以下實施例之一或多者中,當形成該凹槽時,藉由電漿乾式蝕刻來蝕刻該第二基板之一部分以暴露該接合層但不蝕刻該第一基板,且藉由濕式蝕刻來蝕刻該接合層。在上述及以下實施例之一或多者中,由一或多個鍍覆操作形成該等柱。 According to another aspect of the invention, in a method of fabricating a microelectromechanical system (MEMS), electronic circuitry is formed over a front side of a first substrate, electrodes are formed over the first substrate, and in addition to forming the Formation of penetration to the second electrode at the region other than One or more holes in a substrate, the holes are filled with a filling material, a rear side of the first substrate is thinned to expose portions of the filled holes, a bonding layer made of silicon oxide connects a first Two substrates are bonded to the rear side of the first substrate, the bonding layer is interposed between the second substrate and the rear side of the first substrate, post electrodes are respectively formed above the electrodes, and on the second substrate A groove is formed in the middle to expose a bottom of the first substrate. In one or more of the above and following embodiments, when forming the groove, a portion of the second substrate is etched by plasma dry etching to expose the bonding layer but the first substrate is not etched, and by Wet etching is used to etch the bonding layer. In one or more of the above and following embodiments, the posts are formed by one or more plating operations.
上文已概述若干實施例或實例之特徵,使得熟習技術者可較佳理解本發明之態樣。熟習技術者應瞭解,其可易於將本揭示用作設計或修改其他程序及結構之一基礎以實施相同於本文中所引入之實施例或實例之目的及/或達成相同於本文中所引入之實施例或實例之優點。熟習技術者亦應認知,此等等效建構不應背離本發明之精神及範疇,且其可在不背離本發明之精神及範疇的情況下對本文作出各種改變、替代及更改。 The features of several embodiments or examples have been summarized above, so that those skilled in the art can better understand aspects of the present invention. Those skilled in the art will appreciate that they can readily use this disclosure as a basis for designing or modifying other programs and structures to carry out the same purposes and/or achieve the same purposes as the embodiments or examples introduced herein. Advantages of an embodiment or example. Those skilled in the art should also recognize that such equivalent constructions should not depart from the spirit and scope of the present invention, and that they can make various changes, substitutions and changes herein without departing from the spirit and scope of the present invention.
10C:微機電系統(MEMS)裝置 10C: Micro-Electro-Mechanical Systems (MEMS) Devices
20:電路基板 20: Circuit board
25:電子電路/電子電路系統/互補式金屬氧化物半導體(CMOS)電路 25: Electronic Circuits/Electronic Circuit Systems/Complementary Metal Oxide Semiconductor (CMOS) Circuits
30:支撐基板 30: Support substrate
35:開口/腔/凹槽 35: Opening/cavity/groove
40:接合層 40: joint layer
50:第一導電層 50: The first conductive layer
55:第二導電層 55: Second conductive layer
57:第三導電層 57: The third conductive layer
60:通孔 60: Through hole
L1:距離 L1: distance
L2:距離 L2: Distance
L3:距離 L3: Distance
T1:厚度 T1: Thickness
T2:總厚度 T2: total thickness
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