WO2005002303A1 - プリント配線板 - Google Patents
プリント配線板 Download PDFInfo
- Publication number
- WO2005002303A1 WO2005002303A1 PCT/JP2004/008721 JP2004008721W WO2005002303A1 WO 2005002303 A1 WO2005002303 A1 WO 2005002303A1 JP 2004008721 W JP2004008721 W JP 2004008721W WO 2005002303 A1 WO2005002303 A1 WO 2005002303A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resistance
- resistance element
- wiring board
- printed wiring
- insulating layer
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
- H05K1/167—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed resistors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0355—Metal foils
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0338—Transferring metal or conductive material other than a circuit pattern, e.g. bump, solder, printed component
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0384—Etch stop layer, i.e. a buried barrier layer for preventing etching of layers under the etch stop layer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/108—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by semi-additive methods; masks therefor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/382—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4644—Manufacturing multilayer circuits by building the multilayer layer by layer, i.e. build-up multilayer circuits
- H05K3/4652—Adding a circuit layer by laminating a metal foil or a preformed metal foil pattern
Definitions
- the present invention relates to a printed wiring board, and more particularly, to a printed wiring board having a built-in resistance element.
- Resistive elements built into such printed wiring boards include those formed by resistive element screen printing, those formed by etching, and those formed by plating.
- a resistance element formed by screen printing is formed, for example, as follows (see Patent Document 1). First, after laminating an insulator material layer and a conductor material layer, a desired conductor pattern is formed on the insulator material layer by a photoetching method. Subsequently, an undercoat layer is formed between predetermined conductor patterns formed on the insulator material layer. Then, a carbon paste is screen-printed on the end portions of the undercoat layer and the conductor pattern adjacent to the undercoat layer, and a resistor element is provided. In this way, a resistance element incorporated in the printed wiring board is formed (hereinafter, referred to as “conventional example 1”). Note that there is also a method of directly applying a paste to a resin without forming an undercoat.
- Non-Patent Document 1 A method is also known in which an insulating layer is formed so as to cover the resistive element, and the copper foil is etched to form a desired conductor pattern (hereinafter referred to as “Conventional Example 2”, Non-Patent Document 1). reference).
- the resistance element formed by etching is formed, for example, as follows (see Patent Document 2). First, after laminating an insulating material layer, a resistance material layer, and a conductive material layer, a first photoresist corresponding to the shape of a desired resistive element is formed on the conductive material layer, and the conductive material layer is etched by etching. Perform selective removal. Subsequently, etching is performed with the first photoresist remaining, so that the selectively removed area of the conductive material layer is removed. The resistive material layer is selectively removed.
- a first photoresist corresponding to a desired shape of the conductor pattern is formed, and the conductor material layer is selectively removed by etching.
- the resistive element built in the printed wiring board is formed.
- the resistance element formed by plating is formed, for example, as follows (see Patent Document 4). First, after laminating an insulator material layer and a conductor material layer, a desired conductor pattern is formed on the insulator material layer by a photoetching method. Subsequently, a resistive element is formed by a plating method between predetermined conductor patterns formed on the insulator material layer. When forming this resistance element, plating is performed on the insulating layer between predetermined conductor patterns and on the ends of the predetermined conductor patterns. In this way, a resistive element built in the printed wiring board is formed (hereinafter, referred to as “Conventional Example 4”).
- Patent Document 1 JP-A-11 4056
- Patent Document 2 JP-A-4-147695
- Patent Document 3 US Patent No. 6281090
- Non-Patent Document 1 DuPont, "Dupont Electronic Materials Printed Circuit Board Embedded Device", [online], 2002.2.15, [Search on April 16, 2003], Internet URL: http: ⁇ www.dupont.co.jp I mcm / apn / pnnt / ER.html>
- a resistive element formed by a screen printing technique may cause liquid paste to flow after printing or resin.
- the thickness and width of the printed resistive element fluctuate due to shrinkage during thermal curing of the adhesive, etc., and the shape changes due to bleeding. As a result, the resistance value cannot be accurately controlled. Further, the resistance value tends to change and the dispersion immediately increases due to the heat applied during the surface treatment and the heat and pressure applied when laminating other layers via the pre-preda on the resistive element.
- the force often does not sufficiently follow the copper foil surface.
- the resistance element and the chemicals such as acid and alkali used during formation, LaB and copper foil surface
- etching of the conductor material layer is performed twice and etching of the resistance material layer is performed once, that is, three times in total.
- the first etching is performed on the conductive material layer to remove the conductive layer on the resistive material layer on a region other than the region where the resistive element is to be formed. Is removed by etching to form a necessary resistance element.
- the side surface of the resistive element material layer area which exists under the conductive layer area which has not been removed by the first etching and is to be the resistive element finally formed is formed. Will also be etched. For this reason, the width of the finally formed resistance element has been reduced.
- the technique of Conventional Example 3 was not capable of accurately forming the resistance value of the built-in resistance element to a desired value.
- Conventional Example 3 in order to prevent erosion on the upper surface of the resistive element, which causes a decrease in precision of the resistance value due to lateral erosion, the resistance of the conductive material layer is reduced during the second etching. An etchant that does not attack the material will be used.
- Conventional Example 3 since the side surface of the resistance element as described above is eroded by etching, it is difficult to form the resistance element with a fine width and a long length in order to obtain a high resistance value. I was
- the present invention has been made under the above circumstances, and an object of the present invention is to provide a printed wiring board having a built-in resistive element having a stable and accurate resistance value in a wide resistance value range. It is in.
- the printed wiring board of the present invention has an insulating layer; a metal as a main component, a surface on one side having a rough surface, an average thickness of 5 to 50% of the rough surface, and the one side of the insulating layer. At least one resistance element buried near the surface on the side; a conductor pattern wiring surface formed by the surface on the one side of the insulating layer and the surface on the one side of the resistance element; And a conductor pattern connected to each terminal.
- the resistance element has a rough surface on one side and an average thickness of 5-50% of the arithmetic average height (Ra) of the surface on one side. For this reason, it is necessary to ensure the average thickness of the resistive element that is stable while maintaining the length of the current path in the resistive element between the conductor patterns (hereinafter also referred to as “electrodes”) connected to both ends of the resistive element. Can be maintained. That is, when forming a resistance element having a low resistance value, the planar shape of the resistance element should be such that the width of the current path is wide and the length of the current path is short, and the average thickness of the resistance element is small.
- the planar shape of the resistance element should be such that the width of the current path is narrow and the length of the current path is long, and the average thickness of the resistance element is one side.
- the arithmetic mean height (Ra) is generally used as a measure of surface roughness, and refers to an amount defined by JIS B 0601-2001 (based on IS04287-1997). .
- the resistance element is embedded near one surface of the insulating layer, and the one surface of the resistance element forms a conductive pattern wiring surface together with the one surface of the insulating layer. It has become. Therefore, even if a conductive material layer such as a copper foil is provided on the conductive pattern wiring surface and a conductive pattern is formed by a photoetching method or the like, the side surfaces of the resistance element are not eroded by the etchant.
- the average thickness of the resistive element is within 50% of the arithmetic average height (Ra) which is the surface roughness of one side of the resistive element.
- Ra arithmetic average height
- the surface on the other side of the resistance element also has undulations. For this reason, the resistance element and the insulating layer are connected with good adhesion.
- the surface on one side of the resistance element is in contact with the surface on the other side of the electrode.
- the electrode and the resistance element are connected with a large area. Therefore, even when the printed wiring board expands and contracts due to heat, the connection can be maintained.
- a structure in which concentrated stress is not easily applied can be achieved. For this reason, the reliability of the connection strength can be improved. Further, even when the printed wiring board is curved, it is possible to prevent the resistance element and the electrode from breaking at the connection surface.
- the printed wiring board of the present invention it is possible to realize a printed wiring board having a built-in resistive element having a stable and accurate resistance value within a wide resistance value range.
- the rough surface has an arithmetic mean height of 0.5-5 ⁇ m. It is easy to roughen the surface of the resistance element so as to fall within this range, and a stable resistance element can be formed.
- the metal serving as the main component of the resistance element is nickel, con- trol, chromium, indium, lanthanum, lithium, tin, tantalum, platinum, iron, rhodium, vanadium, titanium.
- And zirconium force can be at least one selected from the group consisting of nickel, chromium and iron.
- a protective coating made of a material having etching resistance may be formed on the one surface of the resistance element. If it is strong, it is possible to reduce the erosion on the surface on one side of the resistance element due to the etching performed when forming the conductor pattern. Therefore, it is possible to realize a printed wiring board having a built-in resistive element having a more accurate resistance value.
- the resistive element can be formed by various methods such as plating, CVD, and PVD. However, since the resistive element can form a dense and strong film. It is preferable to form by a plating method.
- the printed wiring board of the present invention it is possible to provide a printed wiring board having a built-in resistive element having a stable and accurate resistance value in a wide range of resistance values.
- FIG. 1 is a cross-sectional view showing a schematic configuration of an embodiment of a printed wiring board according to the present invention.
- FIG. 2A is a view for explaining shapes of first and second resistance elements in FIG. 1.
- FIG. 2B is a diagram for explaining the shape of the first resistance element in FIG. 1.
- FIG. 2C is a view for explaining the shape of the second resistance element in FIG. 1.
- FIG. 3A is a diagram showing a schematic configuration of a first resistive element module used for manufacturing the printed wiring board of FIG. 1.
- FIG. 3B is a diagram showing a schematic configuration of a second resistance element module used for manufacturing the printed wiring board of FIG. 1.
- FIG. 4A is a view (No. 1) illustrating a step of manufacturing the resistance element module of FIG. 3A.
- FIG. 4B is a view for explaining a manufacturing process of the resistive element module in FIG. 3A (part thereof).
- FIG. 4C is a view for explaining a manufacturing process of the resistive element module in FIG. 3A (part thereof).
- FIG. 5A is a view for explaining a manufacturing process of the resistive element module of FIG. 3A (part thereof).
- FIG. 5B is a view for explaining a manufacturing process of the resistive element module in FIG. 3A (part thereof).
- FIG. 6A is a view (No. 1) for explaining the manufacturing process of the printed wiring board in FIG. 1.
- FIG. 6B is a view (part 2) for explaining a manufacturing step of the printed wiring board in FIG. 1;
- FIG. 6C is a drawing (part 3) for explaining a manufacturing step of the printed wiring board in FIG. 1.
- FIG. 7A is a view (part 4) for explaining a manufacturing step of the printed wiring board in FIG. 1.
- FIG. 7B is a view (part 5) for explaining a manufacturing step of the printed wiring board in FIG. 1;
- FIG. 7C is a view (No. 6) for explaining the manufacturing step of the printed wiring board in FIG. 1.
- FIG. 8A is a view (No. 7) illustrating a step of manufacturing the printed wiring board of FIG. 1.
- FIG. 8B is a view (part 8) for explaining a manufacturing step of the printed wiring board in FIG. 1;
- FIG. 8C is a drawing (No. 9) for explaining the manufacturing step of the printed wiring board in FIG. 1.
- FIG. 9A is a view (No. 10) for explaining the manufacturing step of the printed wiring board in FIG. 1.
- FIG. 9B is a view (No. 11) for explaining the manufacturing step of the printed wiring board in FIG. 1;
- FIG. 10A is a view (No. 12) for explaining the manufacturing step of the printed wiring board in FIG. 1.
- FIG. 10B is a view (No. 13) for explaining the manufacturing step of the printed wiring board in FIG. 1;
- FIG. 11A is a view (No. 14) for explaining the manufacturing step of the printed wiring board in FIG. 1.
- FIG. 11B is a view (No. 15) for explaining the manufacturing step of the printed wiring board in FIG. 1;
- FIG. 12A is a view (No. 16) for explaining the manufacturing step of the printed wiring board in FIG. 1.
- FIG. 12B is a view (No. 17) for explaining the manufacturing step of the printed wiring board in FIG. 1;
- FIG. 13A is a diagram showing a schematic configuration of a first resistive element module used for manufacturing a printed wiring board of a modified example.
- FIG. 13B is a view showing a schematic configuration of a second resistive element module used for manufacturing a printed wiring board of a modified example.
- FIG. 14A is a view (No. 1) for explaining the manufacturing process of the resistance element module in FIG. 13A.
- FIG. 14B is a view (part 2) for explaining a manufacturing step of the resistance element module in FIG. 13A.
- FIG. 14C is a view (part 3) for explaining a manufacturing step of the resistance element module in FIG. 13A.
- FIG. 15A is a view (No. 4) for explaining a step of manufacturing the resistance element module of FIG. 13A.
- FIG. 15B is a view (part 5) for explaining a manufacturing step of the resistance element module in FIG. 13A.
- FIG. 15C is a view (No. 6) for explaining the manufacturing step of the resistance element module in FIG. 13A.
- FIG. 16 is a drawing substitute photograph (microscope photograph) showing the surface 33S of the copper foil (conductor film) 33.
- FIG. 17 is a drawing-substituting photograph (micrograph) showing a cross section of copper foil (conductor film) 33.
- FIG. 1 shows an XZ sectional view of a configuration of a printed wiring board 10 according to one embodiment of the present invention.
- This printed wiring board 10 is a printed wiring board having two built-in resistance elements.
- the printed wiring board 10 includes (a) an insulating layer 11 and (b) an insulating layer 11.
- a conductor pattern formed on the + Z direction side surface and formed by sequentially laminating the conductor patterns 21 and 22U along the + Z direction (hereinafter, referred to as “conductor patterns 21, 22U”). It has.
- the conductor pattern 21 and the conductor pattern 22U have the same XY plane shape.
- the printed wiring board 10 includes (c) an insulating layer 13 formed on the + Z direction side surface of the insulating layer 11 and the conductor patterns 21 and 22U, and (d) a + Z direction side of the insulating layer 13.
- the conductor pattern 35 and the conductor pattern 25U are sequentially laminated along the + Z direction formed on the surface.
- a conductor pattern (hereinafter, referred to as “conductor pattern 35, 25U”) is provided.
- the body pattern 35 and the conductor pattern 25U have the same XY plane shape.
- the printed wiring board 10 includes (e) a resistance element 31 as a first resistance element embedded near the surface of the insulating layer 11 on the ⁇ Z direction side, and (f) a ⁇ Z direction of the insulating layer 11. Side surface and resistance element 31
- the conductor pattern 35 and the conductor pattern 22L are formed along the Z direction on the z-direction side of the pattern wiring surface formed by the z-direction side surface of 11 and formed on the pattern wiring surface.
- Conductive patterns formed by laminating sequentially hereinafter referred to as “conductive patterns 35 and 22L
- the printed wiring board 10 includes (h) a resistive element 31 as a second resistive element embedded near the surface of the insulating layer 12 in the ⁇ Z direction, and (j) a ⁇ Z direction of the insulating layer 12. Side surface and resistance element 31
- Conductive patterns formed by stacking sequentially hereinafter referred to as “conductive patterns 35 and 25L”).
- the conductor pattern 35 and the conductor pattern 25L are in the same XY plane.
- the printed wiring board 10 includes (k) via holes 29 and via holes 29 for interlayer wiring penetrating the printed wiring board 10 in the Z-axis direction. These via holes 29
- a conductor layer is formed on the inner wall of each of the via holes 29 and via holes 29.
- One is electrically conductive.
- the printed wiring board 10 includes (m) a solder mask 27U formed on the + Z direction side surface of the insulating layer 13 and on the + Z direction side surfaces of the conductor patterns 35 and 25U, and (n) Insulation layer 12
- No solder mask 27U is formed on the + Z direction round pattern, and on the Z direction side round pattern of each of the via hole 29 and the via hole 29.
- the insulating layers 11, 12, and 13 may be made of epoxy resin, glass cloth impregnated with epoxy resin (hereinafter, may be referred to as "glass epoxy” or “prepredder”), or polyimide.
- glass epoxy is preferred in terms of dimensional stability, mass productivity and thermal stability.
- the insulating layers 11, 12, and 13 may be formed using the same material selected from the above materials, or may be formed using different materials.
- a conductor metal such as copper, aluminum, and stainless steel can be used, and it is preferable to use copper in terms of workability.
- FIG. 2 schematically shows the configuration of the resistance elements 31 and 31 used for manufacturing the printed wiring board 10.
- FIG. 2B shows an example of a planar shape of the resistance element 31 having a high resistance value, and FIG. 2C shows a low resistance value.
- the + Z direction side surface and the Z direction side surface of resistance element 31 have undulations over the entire surface.
- the arithmetic average height (Ra) of the surface in the Z direction of the resistance element 31 is defined as an arithmetic average height (Ra) of 0.5 to 5 m.
- the resistance element 31 has a thickness in the Z-axis direction of 5 to 50% of the arithmetic average height (Ra).
- the metal that is the main component of this resistance element 31 is nickel, conoret, chromium, indium, lanthanum, lithium, tin, tantalum, platinum, iron, palladium, vanadium, titanium, and zirconia. It is particularly preferable to use nickel, chromium and iron, which are preferably selected from at least one selected from the group consisting of nickel, chromium, and iron. This is due to the following two reasons. First, the above-mentioned metals are hardly oxidized even under high temperature conditions of 200 ° C. or more. Second, these metals have a relatively high specific resistance of 5 ⁇ cm or more (hereinafter sometimes referred to as “high specific resistance metals”).
- alloys can be made relatively easily, and those having various specific resistances can be obtained.
- an alloy with a metal having a specific resistance of 5 ⁇ cm or less such as copper or aluminum hereinafter sometimes referred to as a “low specific resistance metal”
- an alloy of these low specific resistance metals is used.
- the proportion is less than 10% by weight of the whole alloy, an effect that a high corrosion resistance can be obtained without extremely reducing the specific resistance can be obtained.
- the reason why the thickness of the resistance element 31 is set to 5 to 50% of the arithmetic average height (Ra) is as follows.
- the reason why the thickness is set to 5% or more is that, in general, the strength is reduced when the thickness is less than 5% of the arithmetic mean height (Ra) at which the thinner the thickness, the higher the resistance can be obtained. This is because it is not possible to obtain a resistance element having a stable current value and a long current path.
- the reason why the content is set to 50% or less is that if the content exceeds 50%, the occurrence on the rough surface is increased.
- the recesses are buried, so that not only a high resistance cannot be obtained but also the adhesion to the insulating layer 11 (12) is reduced.
- the arithmetic average height is 0.5 to 50 m, the surface of the above-described resistance element can be easily roughened, and stability and resistance accuracy can be improved.
- the meander pattern has a pattern width of 50 ⁇ m and a pattern length of about 100 mm, assuming that the pattern forming surface is flat. Note that, in the present embodiment, the resistance element 31 is
- the rectangular pattern has a pattern width of 100 ⁇ m and a pattern length of 500 ⁇ m, assuming that the pattern formation surface is a plane.
- the resistance element 31 is flat in the Z-axis direction.
- the above-described resistance element 31 can be formed by a plating method, a CVD method, a PVD method, or the like, but it is particularly preferable to use a plating method capable of forming a dense and strong film.
- a plating method capable of forming a dense and strong film.
- an electrolytic plating or an electroless plating is appropriately used according to the composition of the resistance element 31.
- a bath having a composition in which a plurality of the above-mentioned metals or alloys containing these metals are dissolved may be appropriately prepared and used!
- nickel plating a method using a nickel plating bath (hereinafter, referred to as "nickel plating"! Can be most preferably used. Particularly, it is preferable to add 5 to 15% by weight of phosphorus to the total weight of metal and phosphorus in the nickel plating bath. When the phosphorus content is within this range, when the phosphorus content is less than 5% by weight, pinholes are easily formed in the resistance element, and the resistance value is easily changed. In addition, since the bonding strength between nickel crystals is low, the corrosion resistance to heat, a chemical such as an acid or an alkali tends to decrease. Conversely, if the content exceeds 15% by weight, phosphorus in nickel becomes susceptible to oxidation by oxygen, and when used in a high-temperature air atmosphere, the resistance value may change.
- the resistance element module 30 shown in FIG. 3A and the resistance element module shown in FIG. 3B Produces Yule 30.
- the resistance element module 30 includes (i) a support member (hereinafter referred to as “key”).
- a resistance element 31 formed on the + Z direction side surface is A resistance element 31 formed on the + Z direction side surface.
- FIG. 16 shows an electron micrograph of the roughened surface 33S of the conductor film 33.
- the carrier 36 with a conductive film is provided on the surface of the support member 34 on the + Z direction side.
- a commercially available product that can be manufactured by pressing and pasting 3 may be appropriately selected and used.
- Examples of the product include Micro-Thin (manufactured by Mitsui Mining & Smelting Co., Ltd.), XTR (manufactured by Ohrin Brass Co., Ltd.), UTC-Foil (manufactured by METFOILS), and the like. Photomicrograph of a cross section of Micro-Thin (manufactured by Mitsui Kinzoku Mining Co., Ltd.) as an example of a carrier 36 with a conductor film
- the resistance element module 30 has (i) a + Z direction of a support member 34 similar to the support member 34.
- the carrier 36 with a conductor film like the carrier 36 with a conductor film, supports the support member 34
- the carrier 36 with a conductive film is used.
- a dry resist layer 41 is formed (see FIG. 4B).
- the liquid resist for forming the dry resist layer 41 for example, PER-20 (manufactured by Taiyo Ink Co., Ltd.) can be used.
- the dry resist layer 41 on the resistive element formation region is removed to form a concave portion 46, and the resist 46 is formed. Expose the surface of the conductor film 33 in the + Z direction
- the resistive element 31 is formed on the conductive film 33 exposed as described above using a plating method using a bath having a desired composition, a PVD method, a CVD method, or the like.
- a plating method using a bath having a desired composition a PVD method, a CVD method, or the like.
- the resistance element 31 having a desired plating thickness that is, a resistance value
- the composition of the bath and the plating conditions pH, temperature, and current density and energizing time in the case of electrolytic plating
- That nickel sulfate bath (PH4- 5) with a predetermined condition, for example, 40- 60 ° C, a current density of about 2-6A / dm 2 for 1 minute, when the plated, average thickness 0.5 to 20 m A resistance element can be formed.
- Nickel sulfate about 300
- Nickel chloride about 50
- the dry resist 41 is also removed on the surface on the + Z direction side of the conductor film 33 (
- the resistance element module 30 is manufactured.
- the resistance element module 30 is manufactured in the same manner as the resistance element module 30.
- a method of laminating a dry film resist can be used.
- a dry film resist examples include HW440 (manufactured by Hitachi Chemical Co., Ltd.).
- a plurality of concave portions 46 can be formed to form resistance elements having different resistance values, and gold, silver, chromium, iron, vanadium and the like can be formed by physical vapor deposition (PVD). And the + Z direction surface of the conductive films 33, 33 by vapor deposition such as chemical vapor deposition (CVD).
- PVD physical vapor deposition
- CVD chemical vapor deposition
- the resistive elements 31 and 31 can be formed by vapor deposition on top.
- An insulating member is provided on the + Z direction side surface of the resistance element module 30 manufactured as described above, and a conductor film 21A is stacked on the insulating member in the + Z direction, and processed under predetermined conditions.
- the insulating layer 11 and the conductive film 21A are sequentially laminated along the + Z direction by performing a pressure treatment at 185 ° C. and 40 kg / cm 2 for 1 hour (see FIG. 6A).
- the resistance element 31 is embedded near the surface of the insulating layer 11 on the Z direction side.
- Examples of such a pre-printer include GEA-67N (manufactured by Hitachi Chemical Co., Ltd.) and R1661 (manufactured by Matsushita Electric Works, Ltd.).
- the conductor film 21A is the same as the conductor film 33 described above.
- the carrier member 34 is peeled and removed (see FIG. 6B).
- a dry film resist 42U is laminated on the entire surface of the conductive film 21A on the + Z direction side, and a dry film resist 42L is laminated on the conductive film 33 in the Z direction.
- the resist is also removed from the area force on the + Z direction side surface of the conductive film 42U where the above-described conductive pattern 21 is to be formed to form the recess 47U, and the conductive film 42L
- the resist is also removed from the area force on the surface in the Z direction on which the above-described conductor pattern 22 is to be formed to form a recess 47L (see FIG. 7A).
- a plating of a desired thickness is applied to the concave portions 47U and 47L by a plating method using a desired bath. This forms the conductor patterns 22U and 22L (see FIG. 7B). Subsequently, the dry film resist 42U is removed (see FIG. 7C).
- a resist agent is applied to the entire surface of the conductor film 21A and the conductor pattern 22U on the + Z direction side to form a resist 43U.
- a resist agent is applied to the entire surface of the 22L surface in the Z direction to form a resist 43L (see FIG. 8A). Subsequently, the resists 43U and 43L are removed from regions other than the regions where the conductor patterns 22U and 22L are formed by a known lithography method, and the conductor films 21A and 33 in the region are exposed (see FIG. 8B).
- the exposed portion of the conductive film 21A is removed by etching until the + Z direction surface of the insulating layer 11 is exposed.
- the conductive film 33 in the exposed area is removed by etching
- the conductor patterns 21, 22U are formed on the surface on the direction side, and the insulation layer 11 and the resistance element 31 are formed.
- the member 50 is obtained in which the conductor patterns 33 and 22L are formed on the surface in the -Z direction (Fig. 8C
- the XZ plane and the YZ plane of the resistance element 31 are embedded in the insulating layer 11.
- the resistive element 31 1S at the time of manufacturing the resistive element module 30 formed based on the design value maintains its resistance value accurately.
- an insulating layer 13 is formed on the surface of the member 50 on the + Z direction side.
- the same material as that used for forming the above-described insulating layer 11 may be used, or another material may be used.
- the insulating layer 12 is also formed on the surface of the member 50 in the Z direction. The insulating layer 12 should be formed using the same material as the insulating layer 13 described above. Can do.
- the above-described carrier with a conductive film 36 is provided.
- the support member 34 and the support member 34 are peeled off to form the laminate 51 (see FIG. 9B). ).
- a through hole 49 and a through hole 49 are formed in the laminate 51 using a drill or the like (
- plating is performed on the entire surface under desired conditions to form a plating film 25A.
- the thickness of the plating film 25A can be reduced to about 15 m by forming a plating having a thickness of 12 m of chemical copper and 13 to 14 m of electrolytic copper (see FIG. 10B).
- the + of the plating film 25A including the through-hole 49 and the end of the through-hole 49 on the + Z direction side is determined.
- Laminate dry film resist 44U on the entire surface in the Z direction. Also, through holes 49
- Laminate life film resist 44L (see Fig. 11A). And through holes 49 and
- the dry film resist 44L on the portion is removed by a well-known photolithography method, exposing the plating film 25A in those regions (FIG. 11B).
- the plating film 25 A and the conductor films 33, 33 in the exposed area are covered with a well-known method.
- solder masks 27U and 27L are formed on the entire side surface and the Z direction side surface. Thus, the printed wiring board 10 is manufactured.
- the printed wiring board incorporating the resistance element of the present invention may be further subjected to a treatment such as nickel plating and solder plating, if desired.
- the resistance elements 31, 31 1S are identical as described above, in the present embodiment.
- resistance elements 31, 31 are embedded near the surface of the insulating layers 11, 12 in the Z direction, and
- the conductor pattern wiring surface is formed. Therefore, even if a conductive material layer is provided on the conductive pattern wiring surface and a conductive pattern is formed by a photoetching method or the like, the side surfaces of the resistance elements 31 and 31 are not eroded by the etchant.
- the average thickness of the resistance elements 31, 31 is determined by calculating the surface roughness of the resistance elements 31, 31 on the Z direction side.
- the resistance elements 31, 31 and the insulating layers 11, 12 are connected with good adhesion.
- the protective film is formed to a thickness that does not substantially affect the resistance value of the resistance element 31.
- a printed wiring board having a built-in resistive element 31 having such a protective film formed thereon is formed as follows. Manufactured.
- the resistive element module 30 ′ is
- a protective film 32 is formed between j j j of the conductor film 33 and the resistance element 31.
- the material of the protective film 3 when the conductor film 33 is a copper film, chromium (Cr), iron (Fe), silver (Ag), gold (Au), vanadium (V), etc. Can be used.
- the conductor film 33 is a silver film, chromium (Cr), iron (Fe), gold (Au), vanadium (V), or the like can be used.
- the resistance element module 30 ′ When manufacturing the resistance element module 30 ′, the same as in the case of the resistance element module 30 is used.
- a liquid resist is applied to the surface in the Z direction to form a dry resist layer 41 (see FIG. 14B).
- the dry resist layer 41 on the resistive element forming area is removed to form a concave portion 46, thereby forming a resistive element.
- the surface in the + Z direction of the conductor film 33 in the formation region is exposed to a desired size
- a protective film 32 is formed on the surface in the Z direction (see FIG. 15A). Where a very thin protective film
- a sputtering method which is a type of PVD method.
- a resistive element 31 is formed on the upper surface by a plating method (see FIG. 15B). And the conductor film 33
- the element module 30 ' is manufactured.
- the resistance element module 30 ' is manufactured in the same manner as the resistance element module 30.
- an ultra-thin copper foil with a carrier (Micro-Thin, manufactured by Mitsui Kinzoku Mining Co., Ltd.) was used as a conductor film with a carrier whose surface was roughened.
- the ultra-thin copper foil with a carrier has a copper layer having a thickness of 3.5 m, and the arithmetic average height (Ra) of the surface of the copper layer is 1.2 ⁇ m.
- a dry film resist (HW440, manufactured by Hitachi Chemical Co., Ltd.) was laminated on this copper layer, and photolithography was performed under the conditions that the light amount was 110 mJ and the development was performed for 30 seconds using NaCO as a developer.
- hypophosphorous acid reducing bath (pH 4-5) having the composition shown in Table 3 below, at about 90 ° C,
- Electroless nickel plating was performed under the condition of 2 minutes. As a result, an electroless nickel film containing 10% by weight of phosphorus was formed. The average thickness of this film was 0.2111, and the ratio to 1 ⁇ a was 16.7%.
- a printed wiring board having a resistance value lower than that of the resistance element manufactured in (11) above and having the resistance element was manufactured as follows.
- an ultra-thin copper foil with a carrier having a roughened surface (Micro Thin, manufactured by Mitsui Kinzoku Mining Co., Ltd.) was used.
- This ultra-thin copper foil with carrier is a 35 m thick electrolytic copper foil carrier 34, a 5 m thick copper layer 33 was formed via an organic adhesive layer.
- FIG. 17 is a cross-sectional photograph of the surface of the ultra-thin copper foil with carrier shown in FIG. On this surface, copper particles having a diameter of 11 are superimposed on one another to form a highly undulating surface.
- this surface is referred to as “conductor surface”.
- a liquid resist (manufactured by Taiyo Ink Co., Ltd., PER-20) was applied to one surface of the ultra-thin copper foil with carrier to form a resist on the resistive element region. Subsequently, the resist was removed by photoetching, and the above conductor surface was exposed through the opening to a size of 100 m in width and 900 m in length.
- Table 5 shows chromium sulfate bath composition (pH2. 0-2. 7) using, 30- 55 ° C, current density of about 18- 48A / dm 2, subjected to Kuromumetsuki under conditions of about 1 minute Otherwise, the resistive element for Example 2 was formed in the same manner as in (1-2) above.
- the average thickness of the chrome plating formed here was 1.6 m, and the ratio to Ra was 42%.
- a very thin copper foil with a carrier having a roughened surface (Micro Thin, manufactured by Mitsui Kinzoku Mining Co., Ltd.) was used.
- This ultra-thin copper foil with a carrier is obtained by forming a 5 m-thick copper layer 33 on an 35 m-thick electrolytic copper foil carrier 34 via an organic adhesive layer.
- the arithmetic mean height (Ra) of the surface is 3.8 m.
- a dry film resist (HW440, manufactured by Hitachi Chemical Co., Ltd.) was laminated on this copper layer, and photolithography was performed under the condition that the amount of light was 110 mJ and Na CO was used as a developing solution for 30 seconds.
- Graphography was performed to form a meander pattern having a width of about 50 / ⁇ and a length of about 100 mm to form an opening of about 1.2 mm ⁇ 4.5 mm.
- hypophosphorous acid reduction bath (pH 4-5) having the composition shown in Table 3 above was used at about 90 ° C.
- Electroless nickel plating was performed under the condition of 2 minutes. As a result, an electroless nickel film containing 10% by weight of phosphorus was formed. The average thickness of this film is 0.19 / z m,
- the ratio to Ra was 5.0%.
- a resistance element for Example 15 was manufactured in the same manner as in (11) above, except that electroless nickel plating was performed at about 90 ° C for 5 minutes, containing 10% by weight of phosphorus. An electroless nickel film was formed. The average thickness of this film is 0.6 m, and the ratio to Ra is 50
- Example 2-1 The average plating thickness and the ratio to Ra of the resistive element for 2-5 are described later. J intends [arc shown in Table 10 [This is, 8. was 3 one 16.7 0/0.
- a resistance element of Example 3-1-3-12 was produced in the same manner as in (2) above, except that electroless plating was performed using various metals shown in Table 11 instead of nickel.
- the composition of the plating bath was as shown in Table 6 below.
- the plating bath was plated under the following conditions: pH 3-5, plating temperature 50-90 ° C, and 1-2 minutes.
- the metal compounds shown in Table 11 used in the following metal baths include cobalt sulfate, indium sulfate, indium sulfate, lithium sulfate, titanium sulfate, chromium sulfate, tin sulfate, iron sulfate, and vanadium sulfate.
- sulfuric acid-based compounds such as zirconium sulfate
- chloride-based compounds such as iron chloride, chloride, and chromium chloride
- oxides such as tantalum oxide were appropriately selected and used.
- an ultra-thin copper foil with a carrier with an arithmetic average height of 7 ⁇ m As a supporting member, an ultra-thin copper foil with a carrier with an arithmetic average height of 7 ⁇ m (Olin Blast Co., Ltd.
- Ultra-thin copper foil with carrier or 3.8 m ultra-thin copper foil with carrier (Micro-Thin, manufactured by Mitsui Kinzoku Mining Co., Ltd.).
- Table 8 shows the average thickness of nickel plating and the ratio to Ra of the manufactured nickel-plated resistance element for Comparative Example 1.
- the average plating thickness of the resistance element for Comparative Example 1 was 2.8 / ⁇ , and the ratio of the average plating thickness to Ra was 73.7%.
- Example 11 The same surface-roughened electrode with a carrier as used in the production of the resistance element for 1 Thin copper foil (Micro-Thin, manufactured by Mitsui Kinzoku Mining Co., Ltd.) was used.
- an ultra-thin copper foil with a carrier with an arithmetic average height of 7 ⁇ m (made by Aurinblast Co., Ltd.) or an ultra-thin copper foil with a carrier of 3.8 m (Mitsui Metal Mining Micro-Thin) manufactured by KK was used.
- Table 9 shows the average thickness of the nickel plating formed here and its ratio to Ra.
- the average plating thickness of the resistance element for Reference Example 1 was 2.3 / ⁇ , and the ratio of the average plating thickness to Ra was 32.9%.
- the same ultra-thin copper foil with carrier (Micro-Thin, manufactured by Mitsui Mining & Smelting Co., Ltd.) having the roughened surface used in the manufacture of the resistance element for Example 11 was used.
- a module 30 for manufacturing printed wiring boards was provided.
- the insulating layer 11 is opposed to the resistance element 31 or 31.
- a pre-preda (GEA-67N, manufactured by Hitachi Chemical Co., Ltd.) having a thickness of 60 ⁇ m was placed in the container. Then, a copper foil 21A (manufactured by Mitsui Kinzoku Co., Ltd., thickness: 12 m, 3EC-III) is further placed on the surface of the pre-preder not facing the resistance element, and the temperature is set at 185 ° C and 40 kgZcm 2 for 1 hour. A pressure press was performed. After the prepreg was cured, the carrier member 34 was mechanically peeled off.
- a copper foil 21A manufactured by Mitsui Kinzoku Co., Ltd., thickness: 12 m, 3EC-III
- Life film resist (HW440, manufactured by Hitachi Chemical Co., Ltd.) was laminated with a laminator. Thereafter, photolithography was performed to provide a concave portion 47U as shown in FIG. 7A.
- a resist layer 43U was formed in the + Z direction of the copper foil 21A and a resist layer 43U was formed in the Z direction of the copper foil 33 using a laminator or a roll coater as shown in FIG. 8A.
- the resist layer is removed from the areas not covered with the plating films (conductor patterns) 22U and 22L, and the copper foil 33 is etched until the resistive element 31 is exposed.
- each of the resistance elements manufactured as described above was subjected to a 10% NaOH solution at 50 ° C. Was used to carry out a black dyeing treatment.
- a through hole was formed at a predetermined position by a drill, and under the plating conditions shown in Table 8 below, the through hole was formed as described above.
- a copper plating with a thickness of 15 m was applied to the entire body (see Fig. 10B).
- an acrylic resin-based dry film resist (HW440, manufactured by Hitachi Chemical Co., Ltd.) was applied on both sides of the copper plated laminate by a laminator, and the resist layer was formed. 44 was formed. Photolithography under the condition of showering Na CO for 30 seconds
- an opening 25A as shown in FIG. 11B is formed, and etching is performed using an alkaline etchant.
- Electrodes consisting of 3, 25 L and 35 were formed.
- the resistance value of the multilayer printed wiring board manufactured as described above was measured using a resistance measuring machine (3244 Hi TESTER, manufactured by HIOKI Co., Ltd.). When the resistance value of each resistor element measured in (6-1) above is used as the target value, how much the measurement result deviates from the target value! 9-11.
- the deviation amount of each of the resistance elements up to 12 and the resistance elements of Reference Examples 13 to 13 were all 5% or less, and were judged to be good.
- the resistance element of Example 11-3-12 showed a low value of 3% or less, and was judged to be very good.
- the displacement of the resistive elements of Comparative Examples 1 and 2 exceeded 5%, and it was not possible to judge that the resistance was good.
- the resistance value (resistance value 3) at a temperature of 260 ° C. of the resistance elements of the above Examples, Comparative Examples and Reference Examples was measured using a resistance measuring machine (3244 Hi TESTER, manufactured by HIOKI CORPORATION).
- a force that can judge that the resistance change rate is 5% or less as a good example.
- the resistance change rate in the case of using the resistance element of 11-3-12 and the resistance element of Reference Example 1-3 is 5 % Or less, which was good.
- the resistance elements of Examples 1-1 to 3-12 showed even lower values of 3% or less, and were judged to be very good.
- the resistance element of Comparative Example 2 could not be measured, and the resistance element of Comparative Example 1 had a force of 5% or less. The rate of change was large, and it was not possible to judge it as good.
- the example was the lowest, followed by the reference example and the comparative example.
- the resistance change rate of the laminate in the oil dip test can be determined to be good when it is 12% or less.
- the phosphorus content of Examples 2-1 to 2-5 is 5 to 15% by weight, and the phosphorus contents of the laminates of Reference Examples 2 and 3 are 3% by weight and 17% by weight.
- the rate of change in resistance after the above oil dip test showed that when the phosphorus content was 5 to 15% by weight, it was possible to produce a laminate having even less error, high structural stability, and high stability.
- the printed wiring board of the present invention can provide a printed wiring board having a built-in resistive element having a stable and accurate resistance value. Useful as a wiring board.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
- Manufacturing Of Printed Wiring (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04746190A EP1641329A4 (en) | 2003-06-30 | 2004-06-21 | CIRCUIT BOARD |
CN2004800169813A CN1810065B (zh) | 2003-06-30 | 2004-06-21 | 印刷线路板 |
JP2005511011A JP4606329B2 (ja) | 2003-06-30 | 2004-06-21 | プリント配線板 |
TW093119068A TWI276374B (en) | 2003-06-30 | 2004-06-29 | Printed wiring board |
US11/253,734 US7453702B2 (en) | 2003-06-30 | 2005-10-20 | Printed wiring board |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-186063 | 2003-06-30 | ||
JP2003186063 | 2003-06-30 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/253,734 Continuation US7453702B2 (en) | 2003-06-30 | 2005-10-20 | Printed wiring board |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005002303A1 true WO2005002303A1 (ja) | 2005-01-06 |
Family
ID=33549680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/008721 WO2005002303A1 (ja) | 2003-06-30 | 2004-06-21 | プリント配線板 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7453702B2 (ja) |
EP (1) | EP1641329A4 (ja) |
JP (1) | JP4606329B2 (ja) |
KR (1) | KR100736665B1 (ja) |
CN (1) | CN1810065B (ja) |
TW (1) | TWI276374B (ja) |
WO (1) | WO2005002303A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010153839A (ja) * | 2008-11-26 | 2010-07-08 | Kyocer Slc Technologies Corp | 配線基板の製造方法 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101252090B (zh) * | 2008-04-02 | 2010-06-02 | 日月光半导体制造股份有限公司 | 线路板的表面处理工艺 |
KR101216864B1 (ko) | 2010-12-29 | 2012-12-28 | 한국이엔에쓰 주식회사 | 인쇄회로기판 및 그 제조방법 |
WO2013118455A1 (ja) * | 2012-02-08 | 2013-08-15 | パナソニック株式会社 | 抵抗形成基板とその製造方法 |
CN103384448A (zh) * | 2013-06-27 | 2013-11-06 | 清华大学 | 印刷电路板及表面处理方法 |
US9613930B2 (en) * | 2013-10-25 | 2017-04-04 | Infineon Technologies Ag | Semiconductor device and method for manufacturing a semiconductor device |
JP2020092119A (ja) * | 2018-12-03 | 2020-06-11 | 株式会社東芝 | 配線板 |
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- 2004-06-21 JP JP2005511011A patent/JP4606329B2/ja not_active Expired - Fee Related
- 2004-06-21 CN CN2004800169813A patent/CN1810065B/zh active Active
- 2004-06-21 KR KR1020057018575A patent/KR100736665B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
TW200503596A (en) | 2005-01-16 |
EP1641329A4 (en) | 2010-01-20 |
CN1810065A (zh) | 2006-07-26 |
JP4606329B2 (ja) | 2011-01-05 |
EP1641329A1 (en) | 2006-03-29 |
TWI276374B (en) | 2007-03-11 |
JPWO2005002303A1 (ja) | 2006-11-24 |
CN1810065B (zh) | 2011-06-29 |
US20060049509A1 (en) | 2006-03-09 |
US7453702B2 (en) | 2008-11-18 |
KR100736665B1 (ko) | 2007-07-06 |
KR20060052664A (ko) | 2006-05-19 |
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