CN105813383A - Carbon film circuit board printed with basic component - Google Patents
Carbon film circuit board printed with basic component Download PDFInfo
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- CN105813383A CN105813383A CN201610150981.7A CN201610150981A CN105813383A CN 105813383 A CN105813383 A CN 105813383A CN 201610150981 A CN201610150981 A CN 201610150981A CN 105813383 A CN105813383 A CN 105813383A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 106
- 238000007639 printing Methods 0.000 claims abstract description 76
- 238000005530 etching Methods 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims description 26
- 239000004020 conductor Substances 0.000 claims description 24
- 230000004888 barrier function Effects 0.000 claims description 18
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 17
- 238000012360 testing method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 12
- 229910052709 silver Inorganic materials 0.000 claims description 12
- 239000004332 silver Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 229920002521 macromolecule Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 230000010412 perfusion Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000012938 design process Methods 0.000 claims description 3
- 238000007650 screen-printing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 239000000758 substrate Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 2
- 240000006829 Ficus sundaica Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- 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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0005—Apparatus or processes for manufacturing printed circuits for designing circuits by computer
-
- 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
- H05K2203/17—Post-manufacturing processes
- H05K2203/171—Tuning, e.g. by trimming of printed components or high frequency circuits
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
Abstract
The invention relates to a carbon film circuit board printed with a basic component. By printing an adjustment resistance part and etching multiple adjustment switches, an actual resistance value of a resistor in the basic component formed by printing is adjusted, and the accuracy of an electrical parameter of the basic component in the carbon film circuit board is improved.
Description
Technical field
The present invention relates to a kind of printed wiring board, especially a kind of carbon film wiring board printing primary element.
Background technology
PCB (PrintedCircuitBoard), i.e. printed substrate, is one of the vitals of electronics industry.On insulating substrate, according to software design, by printing molding, printed substrate provides the conductive pattern that between electronic component, electronics connects.
In order to meet the demands such as the growing work of Producer, consumer and researcher, study, amusement, in people's work and life, various electronic equipments and electronic product are after realizing digitized step by step, and the process of lightness and miniaturization is also more and more faster.Printed substrate owing to its volume having is little, lightweight, circuit design is ripe, be beneficial to the features such as large-scale mass production, the modal connection carrier being increasingly becoming in electronic equipment and electronic product electronic component, occupy increasingly consequence.Almost every kind of electronic equipment and electronic product, little of accutron, computer, arriving greatly computer, communication electronic device, military issue weapons system, as long as there being the electronic components such as integrated circuit, for the electric interconnection between them, printed substrate will be used.
Along with the high-precision tipping of electronic equipment and electronic product, the printed substrate of the primary elements such as the conventional fabrication processes of printed substrate is also being updated, a kind of printed resistor arises at the historic moment.This printed substrate abandoned in traditional printing wiring board use fill the primary elements such as mounted resistor disc, directly adopt mode of printing that at the dress of resistor disc before, carbon containing ink printing is pasted position, replace filling mounted resistor disc, form the primary element with certain electrical characteristic, for instance there is the fixed carbon resister of certain resistance.That is, on such carbon film wiring board, conductive pattern and primary element all pass through printing and obtain, eliminate the dress patch process of the primary elements such as later stage resistor disc, it is greatly saved operation, improves production efficiency, outside decreasing cost of labor, cost owing to filling mounted resistor disc itself is also expensive than containing carbon printing ink, also greatly reduces material cost.Meanwhile, such carbon film wiring board flexibility ratio when software design also has certain lifting.
But, in prior art, when adopting such technique to print primary element on carbon film wiring board, do not ensure that the accuracy of the electric parameter of primary element.Such as, when printing fixed carbon resister, the deviation of resistance value is merely capable of controlling within positive and negative 20%.Although this accuracy on the low side can meet the demand of some application scenario, but cannot playing a role in a lot of fields pursuing sophisticated design and control, can only be continuing with traditional filling mounted resistor disc, this is clearly production firm without wishing to seeing.Therefore, need one badly can pass through to detect, adjusting, thus ensureing the carbon film wiring board of the high precision of primary element electrical characteristic parameter.
Summary of the invention
For solving above-mentioned problems of the prior art, the invention provides a kind of carbon film wiring board printing primary element.The present invention is by having the mode printed containing carbon printing ink of proper resistor rate according to preset pattern, print the resistance of primary element, composition carbon film wiring board, adjust active component by printing and etch multinomial adjustment switch, it is adjusted printing the actual resistance of resistance in the primary element formed, improves the accuracy of primary element electric parameter in carbon film wiring board.
The present invention provides a kind of carbon film wiring board printing primary element, it is characterized in that, there is in printing zone on circuit base plate the carbon film primary element of printing, active component in described carbon film primary element includes initial value active component, 8 adjust active component and multinomial adjustment construction of switch, the resistance of initial value active component is designed as active component and demarcates the 80% of design load, the resistance of each adjustment active component is designed to active component and demarcates the 5% of design load, wherein, the printing zone of described active component is divided into length L, the rectangle adjustment region of the rectangle initial value region of width m and expansion that area is initial value region 20%；In initial value region, there is the initial value active component of the own font formed according to the design resistance printing of initial value active component, the initial value active component of described own font is made up of the fixed carbon resister trace with carbon containing ink printing, the fixed carbon resister trace of initial value active component is printed as width edge circumvolution n time in initial value region, and the fixed carbon resister trace total length of initial value active component is (n*L+m)；The local width of the fixed carbon resister trace that printing is formed is w, and the thickness of carbon film is h；The resistance R=ρ of initial value active component*(n*L+m)/(w*H), wherein ρ is resistivity, deployed determine containing carbon printing ink for what print；In adjustment region, there is the adjustment active component of 8 in-lines formed according to the design resistance printing adjusting active component, the adjustment active component of each described in-line is made up of the linear fixed carbon resister trace with carbon containing ink printing, and the length of each adjustment active component is l；The local width of the fixed carbon resister trace that printing is formed is w, and the thickness of carbon film is h；The resistance r=ρ of each adjustment active component*l/(w*h)；Described printing zone also has the conductor trace figure that printing is formed, first end points of described initial value active component is connected to the first circuit access point by described conductor trace figure, is connected with the printed circuit other parts of carbon film wiring board by this first circuit access point；Described conductor trace figure also concatenates 8 in adjustment region and adjusts the second end points of the initial value active component in active component and initial value region；And described multinomial adjustment switch is etched in adjustment region, the conductor trace figure that printing is formed constitutes the joint between each the second end points adjusting the joint between active component and multinomial adjustment switch and initial value active component and multinomial adjustment switch；Described multinomial adjustment switch is 9 select 1 switch, for according to the test result to the actual resistance being completed for printing between rear initial value active component the first end points and the second end points, reality accesses the adjustment active component of printed circuit other parts and carries out switch and select；Selection standard is, after selection, the error between overall resistance and the demarcation design load of active component is within 5%；Multinomial adjustment switch includes 9 grooves offered on circuit base plate insulating barrier, article 9, groove has public starting point, this starting point is communicated to second circuit access point by penetrating the punching of insulating barrier, is connected with the printed circuit other parts of carbon film wiring board by this second circuit access point；Article 9, the respective terminal of groove is respectively communicated to any one described joint adjusting active component and initial value active component by penetrating the punching of insulating barrier；Described multinomial adjustment switch by selecting one and irrigating the low resistance silver slurry through circuit of formation from 9 grooves, by being conductively connected of the joint of second circuit access point described in this through circuit realiration and one of them adjustment active component or initial value active component, thus forming series circuit by 0 to 8 adjusted in active component with initial value active component, form final active component；Completing the actual resistance of active component after selecting is 0 to 8 adjustment active component sum that initial value active component selects with multinomial adjustment switch, according to 99 different choice selecting 1 switch, the actual resistance of active component be (8r+R), (7r+R), (6r+R), (5r+R), (4r+R), (3r+R), (2r+R), (r+R) or R one of them.
Further, the carbon film wiring board of above-mentioned printing primary element, it is characterised in that low resistance silver slurry is made up of the flake silver powder of 60%-72%, the macromolecule resin carrier of 24%-38% and 2%-4% additive.
A kind of method that present invention also offers carbon film wiring board manufacturing above-mentioned printing primary element, it is characterized in that, comprise the steps: S1, software design, utilizes overall figure and the layout of PCB design software design carbon film wiring board, in design process, the resistance region high for resistance precise requirements is labeled, for tab area, expand it and account for plate area, additionally expand 20% than when not being labeled；S2, high resistance, containing carbon printing ink, is allocated containing carbon printing ink is mixed with low resistance, part by weight 85%: 15% by allotment containing carbon printing ink；S3, print fixed carbon resister, utilize screen printing technique, the insulating barrier of circuit base plate uses and prints initial value active component and 8 adjustment active components containing carbon printing ink, print initial value active component, 8 conductor trace figures adjusted between active component, multinomial adjustment switch；Make described conductor trace figure that the first end points of described initial value active component is connected to the first circuit access point, be connected with the printed circuit other parts of carbon film wiring board by this first circuit access point；Described conductor trace figure is made to concatenate 8 the second end points adjusting active component and initial value active component；And make conductor trace figure constitute the joint between each the second end points adjusting the joint between active component and multinomial adjustment switch and initial value active component and multinomial adjustment switch；Etching forms 9 grooves of multinomial adjustment switch on the insulating layer；Make described groove have public starting point, carry out penetrating the drilling operation of insulating barrier in this starting point, make punching be communicated to second circuit access point, be connected with the printed circuit other parts of carbon film wiring board by this second circuit access point；Carry out penetrating the drilling operation of insulating barrier at the respective terminal of groove, make punching be communicated to any one described joint adjusting active component and initial value active component；S4, test and adjustment, resistance between test initial value active component the first end points and the second end points, according to test result, the adjustment active component that reality accesses printed circuit other parts carries out switch selection, selection standard is, after selection, the error between overall resistance and the demarcation design load of active component is within 5%；With this standard, select in 9 grooves that multinomial adjustment switchs, perfusion low resistance silver slurry, forms through circuit wherein, by being conductively connected of the joint of second circuit access point described in this through circuit realiration and one of them adjustment active component or initial value active component；Form series circuit by 0 to 8 adjusted in active component with initial value active component, form final active component；The carbon film wiring board of printed resistor is obtained after adjustment.
Further, the method for carbon film wiring board of primary element is printed in above-mentioned manufacture, it is characterised in that low resistance silver slurry is made up of the flake silver powder of 60%-72%, the macromolecule resin carrier of 24%-38% and 2%-4% additive.
The carbon film wiring board design compact conformation of the present invention is reasonable, forms primary element and simplifies production process printing mode, reduces the fault rate in generation process and products application, improve the accuracy of primary element electric parameter in carbon film wiring board.
Accompanying drawing explanation
Fig. 1 is the flow chart of the carbon film wiring board of manufacture printed resistor of the present invention.
Fig. 2 is the schematic diagram of the carbon film wiring board of printed resistor.
Fig. 3 is the schematic diagram of multinomial adjustment switch.
Fig. 4 is the top view of any one in multinomial adjustment 9 grooves of switch.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention will be further described.In the following embodiments, it is made that explanation for most commonly seen primary element resistance.Owing to other primary elements can also adjust electrical characteristic parameter by adjusting resistance therein, it will be appreciated by those skilled in the art that other primary elements can also adopt similar scheme to obtain the electrical characteristic parameter of high precision.
Fig. 1 is the flow chart of the carbon film wiring board of manufacture printed resistor of the present invention, comprises the steps:
S1, software design.Utilizing overall figure and the layout of PCB design software design carbon film wiring board, in design process, the resistance region high for resistance precise requirements is labeled, and for tab area, expands it and accounts for plate area, additionally expand 20% than when not being labeled.Due to resistance, to account for plate area originally just very little, for respective resistances, expands 20% and accounts for the global design on wiring board of the plate area and be substantially free of impact.
S2, allotment is containing carbon printing ink.By high resistance containing carbon printing ink and low resistance containing the mixed allotment of carbon printing ink, part by weight 85%: 15%, can meet and print the requirement of fixed carbon resister resistance positive and negative 20% after molding.
S3, prints fixed carbon resister.Utilize screen printing technique, the insulating barrier of circuit base plate uses and prints initial value active component and 8 adjustment active components containing carbon printing ink, print initial value active component, 8 conductor trace figures adjusted between active component, multinomial adjustment switch.Make described conductor trace figure that the first end points b of described initial value active component is connected to the first circuit access point, be connected with the printed circuit other parts of carbon film wiring board by this first circuit access point；Described conductor trace figure is made to concatenate 8 the second end points a adjusting active component and initial value active component；And make conductor trace figure constitute the joint between each the second end points a adjusting the joint between active component and multinomial adjustment switch and initial value active component and multinomial adjustment switch.
Etching forms 9 grooves of multinomial adjustment switch on the insulating layer.Make described groove have public starting point c, carry out penetrating the drilling operation of insulating barrier in this starting point, make punching be communicated to second circuit access point, be connected with the printed circuit other parts of carbon film wiring board by this second circuit access point.Carry out penetrating the drilling operation of insulating barrier at the respective terminal of groove, make punching be communicated to any one described joint adjusting active component and initial value active component.
S4, test and adjustment.Resistance between test initial value active component the first end points b and the second end points a, according to test result, the adjustment active component that reality accesses printed circuit other parts carries out switch selection, and selection standard is, after selection, the error between overall resistance and the demarcation design load of active component is within 5%.With this standard, select in 9 grooves that multinomial adjustment switchs, perfusion low resistance silver slurry, forms through circuit wherein, by being conductively connected of the joint of second circuit access point described in this through circuit realiration and one of them adjustment active component or initial value active component.Form series circuit by 0 to 8 adjusted in active component with initial value active component, form final active component.This method of adjustment takes full advantage of series resistor resistance and adds up to the circuit theory of all-in resistance, and circuit design is simple, accounts for plate area little, and regulated efficiency is high.The carbon film wiring board of printed resistor is obtained after adjustment.
Fig. 2 is the schematic diagram of the carbon film wiring board of printed resistor.Active component includes initial value active component R, 8 adjustment active component r1-r8 and multinomial adjustment switch S structure, the resistance of initial value active component R is designed as active component and demarcates the 80% of design load, and the resistance of each adjustment active component r1-r8 is designed to active component and demarcates the 5% of design load.As in figure 2 it is shown, the printing zone of active component is the rectangle adjustment region B being divided into length L, the rectangle initial value region A of width m and expansion that area is initial value region 20%.In the A of initial value region, there is the initial value active component R of the own font formed according to the design resistance printing of initial value active component R, in order to make full use of space, reduce and account for plate area.
The initial value active component R of described own font is made up of the fixed carbon resister trace with carbon containing ink printing.In Fig. 2, the fixed carbon resister trace of initial value active component R is printed as the width edge circumvolution 3 times at initial value region A, and resistance total length is (3L+m).Visible, during circumvolution n time, the fixed carbon resister trace total length of initial value active component R is (n*L+m).Initial value active component R can also be printed as length sides circumvolution n time at initial value region A, and resistance total length is (L+n*M), but owing to when length sides circumvolution, the circumvolution number of times of the resistance of same length, more than the circumvolution number of times when width edge circumvolution, does not therefore generally adopt.
The local width of the fixed carbon resister trace that printing is formed is w, and the thickness of carbon film is h；The resistance R=ρ * (n of initial value active component*L+m)/(w*H), wherein ρ is resistivity, deployed determine containing carbon printing ink for what print.
LLL
L, in adjustment region B, has the adjustment active component r1-r8 of 8 in-lines formed according to the design resistance printing adjusting active component.The active component r1-r8 that adjusts of each described in-line is made up of the linear fixed carbon resister trace with carbon containing ink printing, the length of each adjustment active component is l, the local width of the fixed carbon resister trace that printing is formed is w, the thickness of carbon film is h, then the resistance r=ρ of each adjustment active component*l/(w*h)；
Also having the conductor trace figure that printing is formed in printing zone, the first end points b of initial value active component R is connected to the first circuit access point by conductor trace figure, is connected with the printed circuit other parts of carbon film wiring board by this first circuit access point.Conductor trace figure also concatenates 8 in adjustment region B and adjusts the second end points a of the initial value active component R in active component r1-r8 and initial value region A.
Multinomial adjustment switch S is etched in adjustment region B, and the conductor trace figure that printing is formed constitutes the joint between each the second end points a adjusting the joint between active component r1-r8 and multinomial adjustment switch S and initial value active component R and multinomial adjustment switch S.Fig. 2 simply illustrates adjust resistance r1-r8 and multinomial adjustment switch S.
Fig. 3 is the schematic diagram of multinomial adjustment switch.As shown in Figure 3, multinomial adjustment switch S 9 selects 1 switch, for according to the test result to the actual resistance being completed for printing between rear initial value active component R the first end points b and the second end points a, the adjustment active component r1-r8 that reality accesses printed circuit other parts carries out switch selection.Selection standard is, after selection, the error between overall resistance and the demarcation design load of active component is within 5%.Multinomial adjustment switch S includes 9 grooves offered on circuit base plate insulating barrier, article 9, groove has public starting point c, this starting point is communicated to second circuit access point by penetrating the punching of insulating barrier, is connected with the printed circuit other parts of carbon film wiring board by this second circuit access point.Article 9, the respective terminal of groove is respectively communicated to any one described joint adjusting active component r1-r8 and initial value active component R by penetrating the punching of insulating barrier.Multinomial adjustment switch S by selecting one and irrigating the low resistance silver slurry through circuit of formation from 9 grooves, by being conductively connected of the joint of one of them adjustment active component of this through circuit realiration second circuit access point and r1-r8 or initial value active component R, thus forming series circuit by 0 to 8 adjusted in active component r1-r8 with initial value active component R, form final active component.
Completing the actual resistance of active component after selecting is that initial value active component R selects 0 to 8 adjustment active component sum in the r1-r8 of S with multinomial adjustment switch, according to 99 different choice selecting 1 switch, the actual resistance of active component be (8r+R), (7r+R), (6r+R), (5r+R), (4r+R), (3r+R), (2r+R), (r+R) or R one of them.Fig. 3 simply illustrates initial value resistance R and multinomial adjustment switch S, multinomial adjustment switch S does not illustrate groove.
Fig. 4 illustrates the top view of any one in multinomial adjustment switch S in 9 grooves.As shown in Figure 4, c point is the starting point that 9 grooves are public, and d point is in 9 terminals.If the groove of c, d point-to-point transmission is chosen, then perfusion low resistance silver slurry wherein, so that c, d two dot circuit path.Low resistance silver slurry is made up of the flake silver powder of 60%-72%, the macromolecule resin carrier of 24%-38% and 2%-4% additive.
Carbon film wiring board according to printed resistor of the present invention, can obtain the fixed carbon resister that resistance accuracy is higher.Such as, the resistance of design fixed carbon resister is 100 ohm, then the design load of initial value resistance R is 80 ohm, and 8 design loads adjusting resistance r1-r8 are 5 ohm.Owing to initial value resistance R is likely to produce the error (adjustment resistance is relatively small due to resistance, can ignore) of positive and negative 20% calculating time error, therefore its actual resistance is likely 64-96 ohm.Test its resistance when being 96 ohm, owing to error is within 5%, 8 can not be passed through and adjust resistance r1-r8 it is adjusted.And test its resistance when being 64 ohm, owing to missing by a mile, adjusting resistance r1-r8 by 8 is adjusted it, and the resistance of final fixed carbon resister can be made to reach 104 ohm, and error is within 5%.When being numerical value between all the other 64-96 ohms for the actual resistance of initial value resistance R, adopt similar Adjusted Option.During practical operation, owing to there is also error when printing 8 adjusts resistance r1-r8, therefore can switch S by multinomial adjustment and repeatedly adjust and test, finally give the result that accuracy is high.
Above example is merely to illustrate the present invention; and it is not limitation of the present invention; those of ordinary skill about technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes fall within scope of the invention, and the scope of patent protection of the present invention should be defined by the claims.
Claims (4)
1. the carbon film wiring board printing primary element, it is characterized in that, there is in printing zone on circuit base plate the carbon film primary element of printing, active component in described carbon film primary element includes initial value active component, 8 adjustment active components and multinomial adjustment construction of switch, the resistance of initial value active component is designed as active component and demarcates the 80% of design load, the resistance of each adjustment active component is designed to active component and demarcates the 5% of design load, wherein
The printing zone of described active component is divided into the rectangle adjustment region of length L, the rectangle initial value region of width m and expansion that area is initial value region 20%；
In initial value region, there is the initial value active component of the own font formed according to the design resistance printing of initial value active component, the initial value active component of described own font is made up of the fixed carbon resister trace with carbon containing ink printing, the fixed carbon resister trace of initial value active component is printed as width edge circumvolution n time in initial value region, and the fixed carbon resister trace total length of initial value active component is (n*L+m)；The local width of the fixed carbon resister trace that printing is formed is w, and the thickness of carbon film is h；The resistance R=ρ of initial value active component*(n*L+m)/(w*H), wherein ρ is resistivity, deployed determine containing carbon printing ink for what print；
In adjustment region, there is the adjustment active component of 8 in-lines formed according to the design resistance printing adjusting active component, the adjustment active component of each described in-line is made up of the linear fixed carbon resister trace with carbon containing ink printing, and the length of each adjustment active component is l；The local width of the fixed carbon resister trace that printing is formed is w, and the thickness of carbon film is h；The resistance r=ρ of each adjustment active component*l/(w*h)；
Described printing zone also has the conductor trace figure that printing is formed, first end points of described initial value active component is connected to the first circuit access point by described conductor trace figure, is connected with the printed circuit other parts of carbon film wiring board by this first circuit access point；Described conductor trace figure also concatenates 8 in adjustment region and adjusts the second end points of the initial value active component in active component and initial value region；And
Described multinomial adjustment switch is etched in adjustment region, and the conductor trace figure that printing is formed constitutes the joint between each the second end points adjusting the joint between active component and multinomial adjustment switch and initial value active component and multinomial adjustment switch；
Described multinomial adjustment switch is 9 select 1 switch, for according to the test result to the actual resistance being completed for printing between rear initial value active component the first end points and the second end points, reality accesses the adjustment active component of printed circuit other parts and carries out switch and select；Selection standard is, after selection, the error between overall resistance and the demarcation design load of active component is within 5%；Multinomial adjustment switch includes 9 grooves offered on circuit base plate insulating barrier, article 9, groove has public starting point, this starting point is communicated to second circuit access point by penetrating the punching of insulating barrier, is connected with the printed circuit other parts of carbon film wiring board by this second circuit access point；Article 9, the respective terminal of groove is respectively communicated to any one described joint adjusting active component and initial value active component by penetrating the punching of insulating barrier；Described multinomial adjustment switch by selecting one and irrigating the low resistance silver slurry through circuit of formation from 9 grooves, by being conductively connected of the joint of second circuit access point described in this through circuit realiration and one of them adjustment active component or initial value active component, thus forming series circuit by 0 to 8 adjusted in active component with initial value active component, form final active component；
Completing the actual resistance of active component after selecting is 0 to 8 adjustment active component sum that initial value active component selects with multinomial adjustment switch, according to 99 different choice selecting 1 switch, the actual resistance of active component be (8r+R), (7r+R), (6r+R), (5r+R), (4r+R), (3r+R), (2r+R), (r+R) or R one of them.
2. the as claimed in claim 1 carbon film wiring board printing primary element, it is characterised in that low resistance silver slurry is made up of the flake silver powder of 60%-72%, the macromolecule resin carrier of 24%-38% and 2%-4% additive.
3. the method manufacturing the carbon film wiring board printing primary element as claimed in claim 1, it is characterised in that comprise the steps:
S1, software design, utilize overall figure and the layout of PCB design software design carbon film wiring board, in design process, the resistance region high for resistance precise requirements is labeled, for tab area, expand it and account for plate area, additionally expand 20% than when not being labeled；
S2, high resistance, containing carbon printing ink, is allocated containing carbon printing ink is mixed with low resistance, part by weight 85%: 15% by allotment containing carbon printing ink；
S3, print fixed carbon resister, utilize screen printing technique, the insulating barrier of circuit base plate uses and prints initial value active component and 8 adjustment active components containing carbon printing ink, print initial value active component, 8 conductor trace figures adjusted between active component, multinomial adjustment switch；Make described conductor trace figure that the first end points of described initial value active component is connected to the first circuit access point, be connected with the printed circuit other parts of carbon film wiring board by this first circuit access point；Described conductor trace figure is made to concatenate 8 the second end points adjusting active component and initial value active component；And make conductor trace figure constitute the joint between each the second end points adjusting the joint between active component and multinomial adjustment switch and initial value active component and multinomial adjustment switch；
Etching forms 9 grooves of multinomial adjustment switch on the insulating layer；Make described groove have public starting point, carry out penetrating the drilling operation of insulating barrier in this starting point, make punching be communicated to second circuit access point, be connected with the printed circuit other parts of carbon film wiring board by this second circuit access point；Carry out penetrating the drilling operation of insulating barrier at the respective terminal of groove, make punching be communicated to any one described joint adjusting active component and initial value active component；
S4, test and adjustment, resistance between test initial value active component the first end points and the second end points, according to test result, the adjustment active component that reality accesses printed circuit other parts carries out switch selection, selection standard is, after selection, the error between overall resistance and the demarcation design load of active component is within 5%；With this standard, select in 9 grooves that multinomial adjustment switchs, perfusion low resistance silver slurry, forms through circuit wherein, by being conductively connected of the joint of second circuit access point described in this through circuit realiration and one of them adjustment active component or initial value active component；Form series circuit by 0 to 8 adjusted in active component with initial value active component, form final active component；The carbon film wiring board of printed resistor is obtained after adjustment.
4. one kind as claimed in claim 3 manufactures the method for carbon film wiring board printing primary element, it is characterised in that low resistance silver slurry is made up of the flake silver powder of 60%-72%, the macromolecule resin carrier of 24%-38% and 2%-4% additive.
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| CN201610150981.7A CN105813383B (en) | 2016-03-16 | 2016-03-16 | A kind of carbon film wiring board of printing primary element |
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| CN201610150981.7A CN105813383B (en) | 2016-03-16 | 2016-03-16 | A kind of carbon film wiring board of printing primary element |
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| CN105813383A true CN105813383A (en) | 2016-07-27 |
| CN105813383B CN105813383B (en) | 2018-10-26 |
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| CN201610150981.7A Active CN105813383B (en) | 2016-03-16 | 2016-03-16 | A kind of carbon film wiring board of printing primary element |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113286444A (en) * | 2021-05-20 | 2021-08-20 | 浪潮电子信息产业股份有限公司 | PCB impedance control method, device, equipment and readable storage medium |
| CN114388168A (en) * | 2022-01-27 | 2022-04-22 | 深圳恒宝士线路板有限公司 | High-resistance carbon oil structure for replacing silver paste |
| CN117693088A (en) * | 2023-12-29 | 2024-03-12 | 中山市成源光电科技有限公司 | Method for dimming and toning COB light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5291179A (en) * | 1991-05-23 | 1994-03-01 | West Electric Company, Ltd. | Printed circuit board |
| CN1416310A (en) * | 2001-10-30 | 2003-05-07 | 李俊豪 | Method for quick resistance trimming by using laser on printed circuit board directly |
| CN101291564A (en) * | 2008-06-13 | 2008-10-22 | 广东风华高新科技股份有限公司 | Manufacturing process of resistor plate, obtained resistor plate and application thereof |
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2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5291179A (en) * | 1991-05-23 | 1994-03-01 | West Electric Company, Ltd. | Printed circuit board |
| CN1416310A (en) * | 2001-10-30 | 2003-05-07 | 李俊豪 | Method for quick resistance trimming by using laser on printed circuit board directly |
| CN101291564A (en) * | 2008-06-13 | 2008-10-22 | 广东风华高新科技股份有限公司 | Manufacturing process of resistor plate, obtained resistor plate and application thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113286444A (en) * | 2021-05-20 | 2021-08-20 | 浪潮电子信息产业股份有限公司 | PCB impedance control method, device, equipment and readable storage medium |
| CN114388168A (en) * | 2022-01-27 | 2022-04-22 | 深圳恒宝士线路板有限公司 | High-resistance carbon oil structure for replacing silver paste |
| CN114388168B (en) * | 2022-01-27 | 2022-12-02 | 深圳恒宝士线路板有限公司 | High-resistance carbon oil structure for replacing silver paste |
| CN117693088A (en) * | 2023-12-29 | 2024-03-12 | 中山市成源光电科技有限公司 | Method for dimming and toning COB light source |
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|---|---|
| CN105813383B (en) | 2018-10-26 |
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Address after: 310006 No. 99 Shuangma Road, Jinbei Street, Linan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Baolin Printed Circuits Co.,Ltd. Address before: 311300 No. 38 Weixi South Road, Jincheng Street, Linan City, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Baolin Printed Circuits Co.,Ltd. |
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Denomination of invention: A carbon film circuit board for printing basic components Effective date of registration: 20220720 Granted publication date: 20181026 Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd. Pledgor: Hangzhou Baolin Printed Circuits Co.,Ltd. Registration number: Y2022330001471 |
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Denomination of invention: A carbon film circuit board for printing basic components Effective date of registration: 20230703 Granted publication date: 20181026 Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd. Pledgor: Hangzhou Baolin Printed Circuits Co.,Ltd. Registration number: Y2023330001343 |
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