EP3350827A1 - Procede d'integration d'au moins une interconnexion 3d pour la fabrication de circuit integre - Google Patents
Procede d'integration d'au moins une interconnexion 3d pour la fabrication de circuit integreInfo
- Publication number
- EP3350827A1 EP3350827A1 EP16770715.7A EP16770715A EP3350827A1 EP 3350827 A1 EP3350827 A1 EP 3350827A1 EP 16770715 A EP16770715 A EP 16770715A EP 3350827 A1 EP3350827 A1 EP 3350827A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulating body
- substrate
- wall
- layer
- horizontal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
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- H01L24/82—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected by forming build-up interconnects at chip-level, e.g. for high density interconnects [HDI]
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- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4846—Leads on or in insulating or insulated substrates, e.g. metallisation
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- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49822—Multilayer substrates
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Definitions
- the present invention relates to the field of the manufacture of an integrated circuit, in particular, the integration of 3D interconnection for the manufacture of integrated circuit having a vertical wall greater than ⁇ ⁇ .
- Current requirements for electronic equipment and systems are mainly related to miniaturization, improved performance, reduced power consumption and lower costs. All branches of electronics are concerned: communications electronics, automotive electronics and more generally on-board electronics, implantable medical electronics, and of course consumer electronics products (computers, video game consoles). games ...), to name just a few examples.
- Joining is a technological process that allows you to carry out and connect miniature integrated circuits (semiconductor chips) on a host substrate of a system board or enclosure.
- Most system assembly solutions are based on the use of micro-welded wires or the flip-chip technique to make the electrical connections between the chips and the substrate.
- the method of connection by micro-welded son is laborious to implement because of the sequential welding son by semi-automated machines.
- This technique also has limitations for integration densities related to mechanical positioning limits, as well as for accessible performance given the lengths of treated son and parasites they introduce.
- the reliability of the connection technique by "flip-chip" is a challenge of design and integration due to failures caused by thermal stresses.
- RF radio frequency
- a dielectric layer 2 is partially deposited on a substrate 1 having a horizontal surface 1a, the dielectric layer 2 having a horizontal surface 2c and a vertical flank 2b connecting the horizontal surface 2c of the dielectric layer 2 to the horizontal surface 1a of the substrate 1 ( Figure 1),
- a metallization coating 3 is deposited on the horizontal substrate 1 and the dielectric layer 2 in order to cover the horizontal surfaces 1a, 2c and the vertical side 2b, so that the metallization coating 3 successively comprises a lower horizontal surface 3a, a vertical surface 3b and an upper horizontal surface 3c (Figure 2),
- a resin layer 4 is then partially deposited on the lower horizontal surface 3a of the metallization coating 3 (FIG. 3),
- a metal interconnection 5 is then formed by metallization on the metallization coating 3 not covered by the resin layer 4, the metal interconnection 5 has a lower horizontal surface 5a, a vertical surface 5b and an upper horizontal surface 5c ( Figure 4) , and the resin layer 4 as well as the metallization coating 3 covered by said resin layer 4 are then removed to discover the horizontal surface 1a of the substrate 1 and thus obtain a passive component, in particular an inductor ( Figure 5).
- 3D interconnection Since the horizontal surfaces and the vertical surface of the metal interconnection are formed simultaneously, it is referred to as 3D interconnection as opposed to a 2.5D interconnection for which the different surfaces of the metal interconnection are successively formed.
- the metallization coating 3 is deposited on the horizontal substrate 1 and on the dielectric layer 2 by a physical deposition process.
- an initiator also called “seed layer enhancement”
- the preparation vertical side 2b is long and expensive due to the application of the initiator.
- the metallization coating 3 is applied discontinuously, which presents as disadvantage of generating open electrical circuits preventing the formation of the metal interconnection 5.
- the patent application WO 99/14404 A1 discloses a method for forming a coating by metal deposition by means of a moderate heat treatment. This application aims to anneal a metal that has been deposited in order to reorganize its internal structure and limit its mechanical weaknesses.
- the patent application US 2003/006493 A1 relates to a method of manufacturing an electronic component in which electronic chips are superimposed vertically pyramid.
- US application 2009/200686 A1 relates to an electrical connection structure which is adapted to cover an elastomeric block.
- the application US 2004/140549 A1 relates to a method of electrical component connection by deposition of metal particles, in particular by an "inkjet" method.
- the application US 2006/192299 A1 relates to a method of manufacturing an electronic equipment comprising a connection extending from a lower plane to a higher plane.
- the object of the invention is therefore to remedy these drawbacks by proposing a method of making 3D interconnection which is simple to implement, reliable and whose cost is low in order to allow the integration, on the one hand, of miniaturized and efficient electronic systems without the use of micro-welded wires or micro-weldings and secondly, high-quality, miniature 3D inductive passive components.
- the invention relates to a method of integrating at least one interconnection for the manufacture of an integrated circuit comprising:
- the method is remarkable in that the first wall is inclined with respect to the vertical direction and has a slope increasing from the horizontal surface of the substrate to the high point of said insulating body, the first wall having a horizontal component and an upper vertical component at 10 ⁇ , the inclination ratio of the horizontal component to the vertical component is between 0.001 and 1 .35. Thanks to such a method, the electrical structure can be applied quickly and conveniently without preliminary application of an initiator as in the prior art, which saves time and reduces costs.
- the inclination ratio range of the first wall makes it possible, on the one hand, to limit the area occupied by the interconnection in order to allow optimum miniaturization and, on the other hand, to facilitate the electrolytic growth of the electrical structure and / or the deposition of a bonding layer on a substantially vertical surface. Thanks to the invention, the structure obtained is monobloc, of quality and fast to form.
- the patent application WO2012 / 045981 discloses a method in which an electrical structure is formed with a vertical flank, that is to say on a non-inclined wall with respect to the vertical direction, or a flank against undercut, that is to say, whose slope is decreasing from the substrate and which requires the use of joints.
- Such an inclination angle makes it possible to distinguish oneself from the "natural" slopes of the silicon layers which are produced by lithography and wet etching.
- Such a slope has a strong inclination and depends on the crystalline plane of the silicon.
- the inclination ratio of the horizontal component on the vertical component is between 0.01 and 1.
- Such a first wall makes it possible to facilitate the electrolytic growth of the electrical structure and / or the deposition of a bonding layer on a substantially vertical surface. Thanks to the invention, the resulting structure is monobloc and is fast to form.
- the insulating body may be formed of insulating material or comprise a body composed of conductive and / or semiconductor and / or magnetic and / or dielectric material which is insulated, that is to say, covered with a layer of insulation.
- the insulating body is made of insulating material.
- the insulating body comprises a body made of conductive material and / or semiconductor and / or magnetic and / or dielectric, covered by an insulating layer.
- an insulating body by covering a body made of conductive material and / or semiconductor and / or magnetic and / or dielectric by an insulating layer, which allows to electrically isolate the interconnections of said body.
- said body composed of conductive and / or semiconducting and / or magnetic and / or dielectric material has a first vertical wall or undercut, the insulation layer covering the first vertical wall or undercut allowing to obtain the inclination of the first wall of the insulating body.
- the insulation layer makes it possible to obtain the desired inclination ratio while the body composed of conductive and / or semi-conductive material conductor and / or magnetic and / or dielectric has a vertical wall or undercut.
- the insulation layer makes it possible to ensure the physical continuity between the surface of the substrate and the said body, which makes it possible to ensure the electrical continuity of the bonding layer and / or the electrical structure. .
- the method can thus be applied in many different configurations.
- said body composed of conductive and / or semiconductive and / or magnetic and / or dielectric material has a first flank wall, the insulation layer covering the first flank wall allowing electrically isolating the interconnections of said body.
- the insulation layer makes it possible to ensure the physical continuity between the surface of the substrate and said body, which makes it possible to ensure the electrical continuity of the bonding layer and / or the monobloc electrical structure.
- the first wall of the insulating body is flat, which makes it possible to improve the adhesion of the conductive layers and to facilitate the method of structuring the electrical structures.
- the body has a trapezoidal section.
- the first wall of the insulating body is curved which improves the electrical and mechanical performance of electrical structures.
- the insulating body has a section in the form of a half-ellipse.
- the first wall of the insulating body forms a staircase having a plurality of horizontal portions and a plurality of vertical portions.
- the first wall of the insulating body consists of a flat portion and a curved portion which improves the electrical and mechanical performance of electrical structures.
- the insulating body has a hysteresis-shaped section.
- the first wall is inclined relative to the vertical direction and has a slope increasing from the horizontal surface of the substrate to the point top of said insulating body, the first wall having a horizontal component and a vertical component greater than 10 ⁇ , the inclination ratio of the horizontal component on the vertical component is between 0.001 and 1 .35, the insulating body comprising a compound body of conductive material and / or semiconductor and / or magnetic and / or dielectric, having a vertical wall or undercut, which is covered by an insulating layer, the insulation layer covering the vertical wall or against -dépouille for obtaining the inclination of the first wall of the insulating body, the method comprises:
- the step of applying the insulation layer makes it possible to adjust the inclination of the slope in a practical manner to promote the deposition of the electrical structure.
- the method comprises a step of insulating the insulation layer through a mask so as to precisely control the inclination of the first wall of the insulating body.
- the mask comprises a zone intended to insolate the first wall of the insulating body, which comprises a plurality of patterns of variable lengths and widths so as to control its inclination.
- the insolation is heterogeneous and can remove different thickness of insulation layer to control the slope.
- said zone comprises a plurality of patterns whose width is decreasing along an axis oriented from the top of the first wall of the insulating body towards the bottom.
- the mask comprises a plurality of different zones of ways to individually control the inclination of several first walls. It is thus possible to realize an integrated circuit adapted to the needs.
- the patterns are positioned parallel to the slope of the first wall of the insulating body so as to achieve a predetermined insolation at a predetermined slope height.
- the exposure is homogeneous at a given height so as to form a uniform inclination.
- the openings in the insulation layer are made during the exposure step, which accelerates the manufacturing process.
- the method comprises a step of depositing a resin layer on the insulation layer so as to form a mold limiting the extension of the electrically conductive material during the deposition step of the electrical structure .
- the mold makes it possible to structure the interconnection formed.
- said mold has a thickness of between 10 and 150 ⁇ and has a width / thickness resolution of between 1 for 0.5 and 1 for 50, preferably between 1 for 2 and 1 for 25.
- the substrate having a cavity in which is positioned the insulating body
- said mold extends at least in part in said cavity adjacent said insulating body.
- the interconnection fills only a single part of the cavity, which increases the flexibility.
- the horizontal component is between 0.1 and 150 ⁇ , preferably between 1 and 75 ⁇ .
- the method comprises a step of depositing a bonding layer on said substrate and said insulating body prior to the deposition step of the electrical structure and / or the resin layer forming the mold.
- a diaper bonding also serves as a base for the electrolytic growth of the electrical structure.
- the method comprises a step of depositing a plurality of one-piece electrical structures of electrically conductive material on a plurality of horizontal surfaces and a plurality of first insulating body walls.
- the first walls extend in different planes so as to form three-dimensional interconnections.
- the invention also relates to an integrated circuit comprising:
- At least one insulating body deposited on said substrate said body having a first wall extending from the horizontal surface of the substrate to a high point of said body
- a one-piece electrical structure of electrically conductive material extending over the horizontal surface of the substrate and the first wall of the insulating body.
- the circuit is remarkable in that the first wall is inclined with respect to the vertical direction and has an increasing slope from the horizontal surface of the substrate to the high point of said insulating body, the first wall having a horizontal component and an upper vertical component at 10 ⁇ , the inclination ratio of the horizontal component to the vertical component is between 0.001 and 1, 35, preferably between 0.01 and 1.
- the integrated circuit comprises a plurality of monobloc electrical structures.
- the insulating body comprises a body composed of conductive material and / or semiconductor and / or magnetic and / or dielectric covered with an insulating layer, also called repassivation layer.
- Figures 1 1 to 16 are schematic sectional views illustrating the successive steps of a method of manufacturing an integrated circuit according to a second embodiment
- Figures 1 7 to 22 are schematic sectional views illustrating the successive steps of a method of manufacturing an integrated circuit according to a third embodiment
- FIG. 23 to 25 are schematic integrated circuit views according to the invention.
- FIG. 26 is a schematic representation of a plurality of inductors according to the invention.
- Figure 27 is a schematic representation of a plurality of inductors according to the invention as well as interconnections according to the invention
- FIG. 28 illustrates a plurality of interconnections according to the invention formed on a substrate comprising a body formed of conductive, semiconductor and dielectric material, insulated by an insulating layer;
- FIGS. 29A and 29B show a step of controlling the inclination of the slope during an exposure step by means of a mask.
- Figures 30A and 30B show a step of forming interconnections in a cavity in which the body is mounted.
- the method according to the invention allows the integration of 3D inductive passive components on a substrate as well as 3D interconnects that connect one or more active or passive components to a substrate.
- a method of manufacturing a monolithic integrated circuit according to a first embodiment of the invention will now be presented with reference to FIGS. 6 to 10 to obtain inductive passive electronic components, such as inductors, transformers, couplers, antennas, integrated passive circuits or interconnections.
- Such interconnections are intended in particular to establish electrical connections between different regions of an active or conductive zone of the substrate, between different active or conductive zones of the substrate or between active or conductive zones of several integrated circuits stacked and / or dispersed over the surface of the substrate. They can also form interconnection elements adapted to allow the electrical connection of a discrete electronic component, that is to say non-integrated to the monolithic circuit.
- Figures 6 to 16 are presented in an orthogonal X, Y coordinate in which the X axis extends horizontally from left to right while the Y axis extends from bottom to top.
- the terms “lower” and “upper” are defined relative to the vertical axis Y.
- the terms “increasing” and “decreasing” are determined relative to the vertical axis Y in the X, Y mark determined previously.
- a substrate 1 in the form of a horizontal layer is made of a rigid material, such as silicon, glass, metal, alumina, polymer and in combination of different materials or a flexible substrate (made for example of PET, Polymide, etc.). ).
- the substrate 1 may be virgin or comprise conductive and / or insulating structures.
- the substrate 1 is in the form of a wafer with a thickness of between 50 ⁇ and 5mm, for example.
- the substrate 1 comprises a substantially flat upper surface, said upper surface may be rough or include reliefs.
- an insulating body 7 is deposited on the upper surface 1a of the substrate 1.
- the insulating body 7 is made of dielectric material or polymer which will be structured.
- the insulating body 7 comprises a first left inclined wall 7b, an upper horizontal surface 7c forming a high point O of the insulating body 7, a second right decreasing inclined wall 7d.
- the inclined walls 7b, 7d are inclined with respect to the vertical direction Y so as to each comprise a horizontal component Cx and a vertical component Cy.
- the vertical component Cy is at least 10 ⁇ .
- the inclined walls 7b, 7d each have an increasing slope from the horizontal surface of the substrate 1 to the high point of said insulating body 7.
- the body 7 advantageously has a trapezoid-shaped section whose wide base rests on the upper surface 1a of the substrate 1 .
- the second right inclined wall 7d is decreasing in the X, Y coordinate system, but nevertheless has an increasing slope from the upper surface 1a of the substrate 1 to the upper horizontal surface 7c of the insulating body 7.
- the slopes are, in this example, symmetrical but it goes without saying that they could be different.
- the inclination ratio of the horizontal component Cx on the vertical component Cy is between 0.001 and 1 .35, preferably between 0.01 and 1.
- the inclined walls 7b, 7d are planar but it goes without saying that they could be different, in particular, curved as will be presented later.
- an attachment layer 8 is then directly deposited on the upper surface of the substrate 1 and the insulating body 7.
- the attachment layer 8 successively comprises a lower horizontal left portion 8a, a left inclined portion 8b, an upper horizontal portion 8c, a right inclined portion 8d, a lower right horizontal portion 8e respectively covering the left horizontal surface 1a of the substrate 1, the first inclined wall growing left 7b of the insulating body 7, the upper horizontal surface 7c of the insulating body 7, the second right decreasing inclined wall 7b of the insulating body 7 and the right horizontal surface of the substrate 1.
- the walls 8b, 8d of the attachment layer 8 are also inclined as illustrated in FIG. 7.
- the attachment layer 8 also called the electrolytic growth layer, is formed in this example by the deposition of a metallic material, in particular a conducting or semi-conducting material of electricity, suitable for promoting the adhesion of the material constituting the electrical structure by electrolytic growth.
- the attachment layer 8 is a thin layer, of thickness between 1 nm and 2 ⁇ m in titanium, chromium, tantalum, tungsten, aluminum, gold, copper, silver, nickel or metal alloy, and not limited to titanium / tungsten, nickel / boron or metal alloy / semiconductor as and not limited to aluminum / silicon or the like.
- this layer is made in successive deposition of two or more layers of metal, such as titanium / copper, titanium / gold, chrome / gold, titanium / nickel / gold or other possible configurations.
- the attachment layer 8 is deposited by a conventional method of "vertical" deposition of a metal material known to those skilled in the art, in particular by cathodic sputtering, thermal evaporation or electrografting (electrografting). During such deposition, all the surfaces of the substrate 1 and the insulating body 7 are disengaged and are thus easily reached by the metallic material constituting the attachment layer 8, and these surfaces are thus covered homogeneously and continuously .
- resin layers 4a, 4e are then deposited on the attachment layer 8 so as to cover, on the one hand, the regions that are not intended to be brought into contact with the electrical structure and on the other hand, to reveal the regions of the attachment layer 8 intended to be brought into contact with the electrical structure.
- the resin layers 4a, 4e are deposited simultaneously.
- a mold is formed for depositing the electrical structure, capable of limiting the extension of the electrically conductive material during the electrolytic depositing step, the electrically conductive material not being able to deposit on the zones. of the attachment layer 8 covered by the resin layers 4a, 4e.
- the resin layers 4a, 4e are respectively deposited on the lower left horizontal portion 8a and the lower right horizontal portion 8e as illustrated in FIG. 8.
- each resin layer 4a, 4e having the desired structure is obtained by any suitable method known to those skilled in the art, in particular by lithography or jet printing ("inkjet" in its English name).
- each resin layer 4a, 4e has a large thickness, in particular a thickness between 1 ⁇ and 50 ⁇ . In the example shown, it has a thickness approximately equal to 150 ⁇ .
- the resin forming the resin layer 4a, 4e is in particular a photosensitive resin having a resolution of between 1 for 0.5 and 1 for 50, preferably between 1 for 2 and 1 for 25. In the example shown, the resin has a resolution of 1 to 15, that is to say that the smallest trench width that can be obtained by photolithography is ⁇ ⁇ thick. It is thus possible to form patterns of width greater than or equal to 1 ⁇ for a resin thickness of 150 ⁇ .
- the mold formed by the resin layers makes it possible to structure different types of interconnections.
- a body 70 in particular one or more chips
- the invention it is possible to make interconnections in the cavity following the mounting of said body 70, in particular, in the adjacent cavities C1, C2 formed between the body 70 and the raised edge of the substrate 70 as illustrated in FIGS. 30A and 30B.
- a resin block 4a has a portion extending in the first adjacent cavity C1 on the insulating layer 71 so as to limit the dimensions of the interconnection 9. 1 in the first adjacent cavity C1 while allowing it to extend to the upper wall of the body 70 as shown in Figure 30B.
- the interconnection 9-1 has an S-shaped profile.
- a resin block 4e is positioned outside the second adjacent cavity C2 so as to allow the interconnection 9-2 to extend entirely into the second adjacent cavity C2 while allowing it to extend to the upper wall of the body 70 as shown in Figure 30B.
- the interconnection 9-2 has a U-shaped profile.
- Such interconnections 9-1, 9-2 make it possible to stack a large number of electronic chips in a cavity of the substrate while having a thin integrated circuit.
- the electrical structure 9 is then formed by simultaneously depositing, by an electrolytic deposition process, the electrically conductive material on the zones of the continuous bonding layer 8 not covered by the resin layers. 4a, 4th. Because of its continuity, the attachment layer 8 is able to conduct an electric current over its entire surface, and thus to allow the simultaneous formation of a single piece of the electrical structure 9.
- the electrolytic growth is improved, which improves the control of the thicknesses.
- the electrical structure 9 is made of an electrically conductive material, suitable for being deposited by electrolysis. It is advantageously made of copper. Alternatively, it is made of gold or any other metal allowing electrolytic deposition.
- the electrical structure 9 forms for example all or part of an electronic component, in particular a passive electronic component such as an inductor, a transformer, an antenna, etc. It can also form an interconnection line, intended to connect together different regions of the substrate 1 and / or different regions of the substrate 1 and the insulating body and / or different regions of the insulating body.
- the thickness of the electrical structure 9 depends on its electronic function. It also depends on the application of the circuit. By way of example, electrical structures 9 will be provided with higher thicknesses in a power amplifier circuit than in a digital circuit.
- the thickness of an electrical structure 9 is for example between ⁇ ⁇ and 150 ⁇ .
- the resin layers 4a, 4e are dissolved (FIG. 10), for example by immersion of the assembly shown in FIG. 9 in a bath that is suitable for selectively dissolving the resin layers 4a, 4e or by other techniques known to those skilled in the art or provided by the manufacturer of the material.
- the continuous bonding layer 8 is etched in the zones in which it is not covered by the electrical structure 9, that is to say in the areas previously covered by the resin layers 4a, 4e.
- This etching is carried out by any suitable etching process, in particular by wet etching or dry etching.
- FIG. 10 An integrated circuit as shown in FIG. 10 is thus obtained, and comprising an interconnection level formed by the electrical structure 9.
- a second embodiment of the invention is described with reference to FIGS. References used to describe elements of structure or function identical, equivalent or similar to those elements of Figures 6 to 10 are the same, to simplify the description. Moreover, the entire description of the embodiment of Figures 6 to 10 is not repeated, this description applies to the elements of Figures 1 1 to 15 when there are no incompatibilities. Only notable differences, structural and functional, are described.
- the insulating body 7 has a half-elliptical shaped section and comprises a first left-inclined wall 7f and a second right decreasing inclined wall 7g.
- the walls 7f, 7g are inclined relative to the vertical direction Y so as to each comprise a horizontal component Cx and a vertical component Cy.
- the inclined walls 7f, 7g each have an increasing slope from the horizontal surface of the substrate 1 to a high point O of said insulating body 7.
- the inclined walls 7f, 7g are curved so as to form 3D interconnections and inductive passive components such as inductances as will be presented later.
- the inclined walls 7f, 7g advantageously form a half-ellipse.
- the curved inclined walls 7f, 7g facilitate the deposition of the attachment layer 8 as well as the electrical structure 9 '.
- the electrical structure 9 has the shape of a turn.
- the insulating body 7 between the substrate 1 and the attachment layer 8 may be removed by wet etching or dry to further improve the electrical performance at high frequencies of said coil .
- curved 9 'or trapezoidal electrical structures 9 are connected together by the method according to the invention to form monobloc inductors (inductive component) 90, 90'.
- inductive component inductive component
- flat or curved interconnections 10 are made between the elementary turns as illustrated in FIG. 27.
- the simultaneous realization of interconnections 10 and 9 'or trapezoidal curved electrical structures 9, with the aid of a small number of Technological steps, can reduce the costs and manufacturing time of inductive components.
- the insulating body 7 situated between the substrate 1 and the bonding layer 8 is removed in order to improve the performance of inductances and inductive components at high frequencies, since this body has greater dielectric losses than those of the 90, 90 'air.
- the method according to the invention makes it possible to obtain, with a reduced number of technological steps, high-quality inductive passive components.
- it makes it possible to form electrical interconnections 90 "having an inclined wall 9f connecting different active components to a substrate 1 as shown in Figure 27.
- Such a method is particularly advantageous to achieve a vertical height interconnection greater than 10 ⁇ .
- a third embodiment of the invention is described with reference to FIGS. 17 to 22.
- the references used to describe elements of structure or function which are identical, equivalent or similar to those of the elements of FIGS. 6 to 10 are the same, to simplify the description.
- the entire description of the embodiment of Figures 6 to 10 is not repeated, this description applies to the elements of Figures 17 to 22 when there are no incompatibilities. Only notable differences, structural and functional, are described.
- the insulating body 7 was made of insulating material.
- the insulating body 7 comprises a body made of conductive and / or semiconductive and / or magnetic and / or dielectric material 70 which is covered by an insulating layer 71 also called a passivation layer. or repassivation.
- the body composed of conductive and / or semiconductive and / or magnetic and / or dielectric material 70 comprises at least a first wall 70b extending from the horizontal surface of the substrate 1 to a high point of said body 70.
- the body composed of conductive and / or semiconductive and / or magnetic and / or dielectric material 70 is covered by an insulating layer 71.
- the insulation layer 71 is preferably made of dielectric material.
- the insulating layer 71 may be composed of an organic or inorganic material, such as a semiconductor oxide, a metal oxide, a polymer or any other electrically insulating material. It may be deposited by centrifugal coating, by spraying, by spraying, by lamination, by pressing, by growth, by printing (inkjet), by vacuum deposition or by any type of deposit known to those skilled in the art.
- the insulating layer 71 is deposited by evaporation under vacuum, by spraying or by spraying so as to obtain an insulation layer of relatively uniform thickness on all the walls (neither too fine nor too thick).
- the insulating layer 71 is deposited on all the walls (horizontal, vertical, inclined, etc.) of the body 70 and on the substrate 1 so as to completely isolate the body 70 made of conductive and / or semi-conductive material. conductor and / or magnetic and / or dielectric 70.
- a passivation / isolation of the body 70, in particular of the upper face, allows to distance the interconnections of the connections present on the body 70 as well as the latter, which reduces the interactions by electromagnetic coupling and consequently the electrical losses.
- this makes it possible to route interconnections above the connection pads of the body 70, which makes it possible to increase the routing density and to reduce the number of metallization layers necessary for the interconnection of high-density systems. input-output. The manufacturing cost is then reduced.
- openings 72 are made in the insulating layer 71 by means of a photolithography process or by wet or dry etching by plasma or laser so as to structure the insulation layer 71.
- the insulating layer 7 is photosensitive, which makes it possible to dispense with the use of a sacrificial layer to make the openings 72, thus simplifying the structuring, that is to say, the formation of spaces in which the interconnections can be formed 9.
- these openings 72 provided in the insulating layer 71 make it possible to make contact between the interconnections 9 and said body 70 as well as between the interconnections 9 and the substrate 1.
- the insulating layer 71 makes it possible to form a controlled inclination slope on the body composed of conductive and / or semiconducting and / or magnetic and / or dielectric material, the first walls 70b of which are vertical or against -bare.
- the insulating layer 71 performs an electrical insulation function.
- the insulating layer 71 ensures the physical continuity between the substrate 1 and the walls of said body 70, thus making it possible to produce a continuous monoblock electrical structure.
- the insulation layer 71 thus allows the formation of a monoblock electrical structure on a body made of conductive and / or semiconductive and / or magnetic and / or dielectric material 70.
- the insulation layer 71 is preferably deposited by spray ("spray coating").
- the method comprises a step of precise adjustment of the inclination of the slope using a photolithography technique.
- the insulating layer 7, photosensitive in this case is insolated through a mask 100 comprising lines and / or patterns 102, 103 of variable lengths and widths in order to modulate the dose of received energy.
- insolation is heterogeneous.
- Insolation is for example performed with an ultraviolet light source or a laser.
- the insolated portions may be removed, in particular, by means of dissolution in a chemical solution adapted to the material constituting the insulation layer or directly via ablation in the case where an excimer type laser is used during the insolation.
- the thickness of the insulating layer 7, which is removed, is proportional to the received insolation dose.
- the mask 100 includes a zone 101 intended to insolate the slope of the insulation layer 7, which comprises a plurality of patterns 103 of variable lengths and widths so as to control the inclination of said slope. precisely.
- the zone 101 comprises a plurality of patterns 103 whose width decreases along the axis oriented from the top of the downward slope of the slope as illustrated in FIG. 29A.
- the patterns 103 of the mask 100 are positioned parallel to the slope in order to obtain optimal structuring and optimum inclination.
- the structuring is performed at the same time as the step of structuring the openings 72, which accelerates the manufacturing process.
- the mask 102 has dedicated patterns 102.
- the insulating layer 7 comprises a precise slope of inclination as well as openings 72 positioned precisely thanks to the mask 100.
- This structuring can be performed using one or more masks 100 and using one or more insolation stages. Very advantageously, the inclination of each slope can thus be adjusted individually, which increases the routing possibilities.
- the monobloc electrical structures 9 are deposited in a manner similar to the previous embodiments in order to produce interconnections of various and varied shapes. All monoblock electrical structures 9 are deposited simultaneously.
- the method according to the invention allows, by default, the production of multi-level interconnections 9 on a substrate comprising a plurality of insulating bodies 7 dispersed and / or stacked vertically on its surface (FIGS. 23 to 25). It makes it possible to obtain, with a small number of technological steps, miniaturized and efficient three-dimensional systems.
- the method according to the invention thus makes it possible to manufacture integrated circuits, comprising active and passive components, forming monoblock conductive structures, in particular 3D interconnections and inductive passive components having very low levels. losses. It makes it possible to design and produce RF and microwave power amplifiers of small dimensions with a high power output and thus having a reduced power consumption. It can also make it possible to implement an antenna directly on the integrated circuit.
- This method can likewise advantageously be used to assemble and interconnect at Wafer-Level-Packaging wafer scale miniaturized "System-in-Package" type systems.
- the use of the method is not limited to semiconductor substrates, it can be applied to other types of substrates such as glasses, alumina, polymers, PCBs, etc. as well as on flexible substrates (PET, Polyimide ).
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Abstract
Description
Claims
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FR1558544A FR3041147B1 (fr) | 2015-09-14 | 2015-09-14 | Procede d'integration d'au moins une interconnexion 3d pour la fabrication de circuit integre |
PCT/EP2016/071674 WO2017046153A1 (fr) | 2015-09-14 | 2016-09-14 | Procede d'integration d'au moins une interconnexion 3d pour la fabrication de circuit integre |
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EP3350827A1 true EP3350827A1 (fr) | 2018-07-25 |
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EP16770715.7A Pending EP3350827A1 (fr) | 2015-09-14 | 2016-09-14 | Procede d'integration d'au moins une interconnexion 3d pour la fabrication de circuit integre |
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US (1) | US10438923B2 (fr) |
EP (1) | EP3350827A1 (fr) |
FR (1) | FR3041147B1 (fr) |
WO (1) | WO2017046153A1 (fr) |
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US20030006493A1 (en) * | 2001-07-04 | 2003-01-09 | Matsushita Electric Industrial Co., Ltd. | Semiconductor device and manufacturing method thereof |
US20040140549A1 (en) * | 2002-03-28 | 2004-07-22 | Fumio Miyagawa | Wiring structure and its manufacturing method |
NO317846B1 (no) * | 2002-12-23 | 2004-12-20 | Laerdal Medical As | Anordning for plassering pa brystet pa en pasient, for a samvirke med hendene pa en person som utforer brystkompresjoner . |
US6972480B2 (en) * | 2003-06-16 | 2005-12-06 | Shellcase Ltd. | Methods and apparatus for packaging integrated circuit devices |
JP3904541B2 (ja) * | 2003-09-26 | 2007-04-11 | 沖電気工業株式会社 | 半導体装置内蔵基板の製造方法 |
JP2006270009A (ja) * | 2005-02-25 | 2006-10-05 | Seiko Epson Corp | 電子装置の製造方法 |
EP1883107A3 (fr) * | 2006-07-07 | 2014-04-09 | Imec | Procédé pour la formation de dispositifs microélectroniques empaquetés et dispositifs ainsi obtenus |
US7807508B2 (en) * | 2006-10-31 | 2010-10-05 | Tessera Technologies Hungary Kft. | Wafer-level fabrication of lidded chips with electrodeposited dielectric coating |
JP5584474B2 (ja) * | 2007-03-05 | 2014-09-03 | インヴェンサス・コーポレイション | 貫通ビアによって前面接点に接続された後面接点を有するチップ |
TWI341628B (en) * | 2008-02-12 | 2011-05-01 | Taiwan Tft Lcd Ass | Contact structure and bonding structure |
FR2965659B1 (fr) | 2010-10-05 | 2013-11-29 | Centre Nat Rech Scient | Procédé de fabrication d'un circuit intégré |
KR20160006032A (ko) * | 2014-07-08 | 2016-01-18 | 삼성전자주식회사 | 칩, 이를 이용하는 칩 적층 패키지 및 그 제조방법 |
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2015
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2016
- 2016-09-14 EP EP16770715.7A patent/EP3350827A1/fr active Pending
- 2016-09-14 WO PCT/EP2016/071674 patent/WO2017046153A1/fr active Application Filing
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Publication number | Publication date |
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FR3041147A1 (fr) | 2017-03-17 |
US10438923B2 (en) | 2019-10-08 |
WO2017046153A1 (fr) | 2017-03-23 |
US20180254258A1 (en) | 2018-09-06 |
FR3041147B1 (fr) | 2018-02-02 |
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