TW476229B - Circuit board having shielding plate with empty-hole opening pattern to control impedance and transmission time - Google Patents

Abstract

A kind of circuit board, which has a specific shielding plate, contains plural pairs of transmission lines for transmitting signals and can be applied in the circuit of low voltage difference transmission mode. It is capable of generating capacitance and shielding effects for the transmitted signal on the transmission line with different length through the use of empty hole opening patterns on the shielding plate and the position assembly of the empty hole opening patterns so as to improve the impedance and transmission time of transmission line.

Description

476 like

The present invention relates to AM coin making machine DM, 4 daughter board or flexible cable, such as flexible flexible printed circuit board (FPC) or flexible cable ^ ^ ^ λα ^ Curved surface cable (FFC) In particular, a circuit board with an obscured surface may be bent around. From the ^ ^ ^ rn m ^ ^ electric ,, see, and fruit, the obscured surface has a different # 阳 杼 命 扁 定Taxi 0 days "% of the impedance and transmission time of the transmission line in the circuit board or the flexible cable. To strip) circuits. Controllable micro-band-pass mechanical features with miscellaneous ohms when transmitting to the passband data 4 (3.3V), often using micro-band pass (Micro to connect these high-speed logic logic circuits, with micro-band pass circuits. In addition, for high-speed modal The transmission line is a low-voltage method to reduce the data transmission modal transmission line, which requires 1000 and the equipment can produce these structures. However, it will reduce the electromagnetic radiation that can bend the cable. The local speed of the digital computer The structure of logic circuits and passband lines is used to connect some high-speed lines in digital computers to connect these transmission rates. It has the necessary and important transmission for the differential operation with a shielding surface. Error. Differential impedance. Recently, the asymmetry in the transmission of impedance and signal paths in automation technology is a serious disadvantage. It also has a considerable degree of external fatigue. T = Symmetric structure of flat wire, which can not only increase the The mechanical properties of bending and anti-mechanics greatly reduce the effect of electric radiation on the stomach. However, due to the symmetrical structure of the road ^ f, the ground reference plane of the cymbal will be greatly reduced. Low signal-to-signal impedance, because the signal path and the additional ground reference plane are added: t. Considering the band-to-wire plastic flat plate can bend the cable in the direction of repetitive movement and resistance to mechanical fatigue, differential mode Signal path and ground

476229

-^ Case number 87114025 V. Description of the invention (2) The distance between the reference planes The distance between the brushes must not be increased, it must be short. This also means that the thickness of the circuit board must be designed to be better than the table, and the degree is required. At the same time, the same design of the differential mode is maintained to maintain the required k-path method to avoid the impedance. The ground plane or other voltage reference plane is positioned parallel to jT >, t Λ \ Η7 hc], where the conductor is designed to be on the surface of a flexible cable or printed board. The purpose is to control the impedance of the conductor and block: the electromagnetic radiation transmitted by the conductor that surges L 冋. "Printed" electric cables usually use a solid ground plane, but solid winding, except for the film type. Another disadvantage of the FJ ten-conductor ground plane is that the impedance of the signal line can be lower than = value, because the signal A large capacitance is constructed in a small life gap between the line and the solid ground plane or reference plane. Increase the gap between the signal line and the solid ground plane or reference plane to reduce its capacitance and increase the impedance of the signal line, but It ’s thick, so it ’s less warpable, and it ’s easier to re-use it. Like a jaw, the printed circuit board will become thicker and heavier, and the manufacturing cost will be higher. The reference surface with conductive unit is The grid-like pattern has been applied to the micro-bandpass design to increase the impedance and provide windings. But, because the grid is not continuous like a solid reference surface, so: It has been found difficult to control both the impedance and the transmission time of a signal line protected by a grid-like reference surface having only one pattern.

476229 ___ plug number 87114025 V. Description of the invention (3) Controlling the flexible cable and printed electrical impedance using the grid-shaped reference surface is the most difficult one, especially for electrical i-line with surname and band-pass line. In general, when the orientation of the signal line is to be changed by 90 degrees, the turn structure does not include a single 90 degree turn line ς = ^ line. And usually the curve is used to change the orientation, so that "the two orientations are continuously changed from the original orientation to the new orientation. It is quite possible that the second aspect will use the grid at different points in the turn, and the second aspect will be different. The alignment method will cause significant changes in these and cause impedance discontinuities in nature. The impedance of the old-pass and band-pass line structures is determined by the width of the transmission line and the thickness of the conductor. However, ★ The microstrip ㈡ 贝 ㈡ 'and the method of the conductor have too many restrictions on the designer. For example, the poor traditional method is to add the: line ::; :: == with poor winding and resistance For mechanical fatigue, it is necessary to use the same dielectric material to surround the conductor. 2 Cables, yes or no. This is a non-standard printed circuit board. Applications with Xu Xi cannot use the traditional high-speed transmission The micro-bandpass structure has—disadvantages, which will produce cis. Case No. 87U4025 Five-Year Invention Description (4) Crosstalk and reverse phase crosstalk, which seriously affects Zhi Liyi. Coupling: a's signal to another channel; ^ 虎口 口 贝.String said One of the channels is the phenomenon of two-line electric double-parameters. There are many sources of crosstalk, such as electric /¾./number mismatches, especially electric conductors between conductors. Therefore, this kind of inconsistency -Entering the signal of Hong Fen and the body to the other called solid ^ causes f heavy engagement, 'where-the lead when exposed to a heterogeneous medium, and this mismatch is generally in the case of conductor exposure. € Worse, just like the traditional microstrip structure, the degree of transmission of electricity from the external rate to the shielding effect. However, the distance of the undesired thin-type microstrip magnetic waves, and the radiation will also be the traditional microstrip of the circuit board. This means that It is difficult to increase the interference of thick circuit boards or structures under unconditional conditions affecting the system in the surface pass structure. If the band is required, there will be no need to achieve the band pass. It will surround the Ganci Manhuai solid watch. Surface conductors, through-hole junctions in conductor holes, have a large line structure. Note that the surface of the conductor surface is the operating surface of the sub-conductor sub-elements, so the structure of the computer required to increase the number of parameters required by the board will cause a very likely function. Hard to mention This kind of test surface and high impedance reduction problem ... In contrast, there are high-speed transmission wheels that radiate electromagnetic waves to shield the radiation pollution of the foot structure. The conductors separate the conductors. This kind of flexible cable that causes the required bandpass structure The wire needs to be able to bend the reference plane to have the ability to bend thousands of times, to achieve the required impedance and transmission time, so that the signal transmission does not degrade its signal quality, and to provide an acceptable degree of shielding.

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In order to have a slow wave effect, the shading effect of the shielding effect of f is so large that it can transmit gas at high speeds. It is necessary to compensate for this effect by using a shorter transmission line. However, θ can emit unwanted electromagnetic radiation. The transmission time on the heart is faster than the transmission time. When the transmission line length rate has a timing effect, the traditional addition of an extra considerable length compensation in some places can be due to impedance discontinuities. To avoid the same, sometimes it is necessary to control the transmission time to the dielectric constant of the material due to the harmonic mode of chirp. The transmission time is related to the bracketing length. Λ 里 发 The slow wave effect of the Q ί 敝 pattern, as well as the transmission line. σ: This is an important harmonic mode in the local speed transmission rate. The t, ° self-wave plate evil will bounce back and forth between the two ends of the transmission line, and will worsen the transmission. ^ The present invention relates to a flexible cable (a flexible printed circuit board "FPCn", a flexible flat cable FFC, etc.) having a shielding surface for a transmission line (preferably a low voltage differential transmission modal circuit) Etc.) and printed circuit boards. According to the present invention, the impedance and transmission time of the transmission line in the cable can be controlled by the shielding surface with different hollow opening patterns. The combination of the positions with the hollow opening patterns and the positions of the hollow opening patterns, so Capacitance and slow wave effects are the main considerations of the present invention. Two types of different hole opening patterns are used. The first type is to design a shielding surface with a set of different hole opening patterns, and the second type is a combination / group.

Λ Said shame-case number-8! Ui〇25 5. Description of the invention (6) = the same hollow opening pattern (preferably a private small preset combination of gradient solid pattern ... opening pattern) and-with a winding electric i: : 2: 2: When the transmission time and impedance are output, a considers the mechanical bending of the visible line and the thickness of the printed circuit board. The shielding surface applies different air gaps and reduces the transmission line electricity and pattern to produce a slow wave effect to meet the requirements.] 'The moon dagger controls the transmission time and increases the impedance at the same time to connect the thin film lightning guide. _ As the sole ground of the transmission line The silver glue on the circuit is low, and the resistance type impedance that will bounce back and forth at the two ends of the transmission line is reduced to reduce the harmonic mode effect of adding to the ground path (preferably 3 ^ kg). The power consumption of the glue. Edge V ": Power supply to reduce the silver when the interval is inserted to #live value! I 芎 day inch, use a suitable collar at the appropriate position, wood to catch the crosstalk between the transmission line. Therefore, the present invention The purpose of the coil is to wrap the electric wire, which contains J = one; printed! Circuit board or-a kind of masking surface today ^ /, with a pre-a and a masking combination of the first mask pattern guide: J 敝 bread contains a A first-group preset combination of different hole openings is early and a first-preset position combination. The preset position combination number: the position of the same hole opening pattern at T. There are two types of preset position line lines: jn The curve of the tiger line is irrelevant. The second type of m is related to Xinqu, Quan. A circuit board or a cable which further flexure

476229 _Case No. 87111425_ Modification of the year and month _ V. Description of the invention (7) Contains a second masking surface with a second preset masking combination, the second masking bread contains a second set of preset different hollow opening patterns A combination of a conductive unit and a second predetermined position. Another object of the present invention is to provide a simplified method for simplifying the design of impedance and transmission time by using the same first and second positions in combination. This method has the same group of different cavity opening patterns and the same position combination, but the first shielding surface is a mirror image of the second shielding surface. Using the same masking surface can further simplify the design of impedance and transit time. A conductive early element is formed between the first and second shielding surfaces to form a transmission line. Another object of the present invention is to provide a printed circuit board or a flexible cable, which includes a first shielding surface having a predetermined shielding combination, the first shielding surface includes a plurality of conductive units, and the conductive units A combination of a fixed cavity opening pattern (or a set of different cavity opening patterns) and a small number of preset gradient solid patterns. The printed circuit board or the traceable electrical cable further includes a second shielding surface having a second predetermined shielding combination. A conductive unit is formed between the first and second shielding surfaces to form a transmission line. Another object of the present invention is to provide a method for selecting different cavity opening patterns, which will induce a slow wave effect to compensate for its time effect, with a lower undesired electromagnetic radiation.

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87114025 V. Description of the invention (8) Another object of the present invention is to provide a method for selecting a preferred position and a preferred orientation of a small portion of the solid surface. Another printed micro-passband structure with a micro-passband structure includes a first shielding surface including a plurality of preset different hollow openings. Another object of the present invention is to provide a brushed circuit board or a flexible cable, The first shielding surface has a predetermined shielding combination, and the conductive unit has a pattern and a predetermined position combination. Another object of the present invention is to provide a printed circuit board or a flexible cable with a shield of a micro-passband structure. The mask has a preset mask combination, and the preset mask combination includes a plurality of conductive units, the conductive unit has a fixed cavity opening pattern (or a set of different cavity opening patterns) and a small part of the A combination of gradient solid patterns. The above other objects and advantages of the present invention will become more apparent after describing the preferred embodiments in association with the related drawings. The content of the present invention is described in detail with reference to the related drawings and the preferred embodiment. Referring to FIG. 1, a plan view of a shielding circuit board 30 according to a first embodiment of the present invention is shown. The circuit board 30 can connect the substrate and the notebook computer.

Page 11 476229 __Case No. 87] 14Π 奶 __ 年月 日 _ 修 ___ V. Description of the invention (9) Folding display for high-speed transmission rate (4 5 5 MHz) and high impedance (100 ohms) ) For low-voltage (3 · 3 V) differential mode. The circuit board 30 having a turn will have a different transmission time, and the circuit board 30 with a compatible length (about 32 cm) will have a second harmonic mode (910 MHz) of the transmission frequency (455 MHz). The impedance is designed to be approximately 100 ohms. Use the Time Domain Reflector (TDR) to measure the transmission time of different opening patterns, and the measured round-trip transmission time is between 1 · 8 ns (solid reference pattern) and 2. 5 ns (lattice pattern) ), That is, the transmission time is 0 between 0.9 ns and 125 ns. Therefore, the object of the present invention is to use a shielding surface with different hole opening patterns, and simultaneously control the impedance and the transmission time. Different cavity opening patterns can be divided into two categories. The first category is to design a masking surface with a first set of preset different cavity opening patterns. The second category is a set of fixed cavity opening patterns (preferably one) and The preset small part of the solid gradient = 钿 人 $ mouth with a hollow opening pattern | Chenggu] «上 ^ ^ ^ ^ 0, and a does not have a controllable impedance, and also has a slow wave effect to compensate; ^ n B this question; ^ # eight ^ 1 different time effects and cause less undesired electromagnetic radiation. Circuit board 30 is a small part of the second type of gradual solid shielding of the conductive unit area, that is, It is placed at the place where the circuit board 30 turns. Because the impedance at these positions is not, as shown in 4-4 in Figure 1, the pattern is a pattern that does not have a hollow opening pattern. Continuity is usually unavoidable, as is the position of the through pattern and where the cable needs to be folded. Better

4 · / U 厶 厶 7

= The opening pattern of the hole is symmetrical, such as a circular mann. A circle is the best opening for a cavity. It is symmetrical in all directions. Figure wood square, oval, because any feature on the plane is the use of cover 64, 66, 68, that is, in the electricity. This will greatly reduce the specificity of the insert used in the base and can avoid the electromagnetic step. The characteristic is to use 64, 66, 68 wave effects to control the harmonic mode to bounce back and forth in the appropriate resistance. Another transmission line 60, 62 of the present invention is as shown in FIG. There is no grounding method between the grounding conductors for comparison. The mechanical characteristics of the complex bending of the present invention are modal transmission lines 60 and 62. The units with better retarded conductivity can also improve harmonic modes. State impact, the two shielding surfaces 28 and 40 of 66, 68, and 70 are regarded as the only grounding path of 70 between the two ends of the cable, giving the cable two requirements. Therefore, with the transmission point, a way to design a radiation. The shielding surfaces 28 and 40, when, the transmission time of the only grounding system of 70. Use the impedance to reduce the difference between the transmission line 60, 62, and the differential mode, as shown in the middle point of the figure. It is better to make the difference. Because the film type requires 64, in most cases, as shown in the figure. One end of the Thai 30 to the other-minus ^ ^ in the rectus muscle source 88 疋 circuit board layer. The thin film conductive unit = most likely is in the middle of the circuit board 30 (the transmission line 60, 62 64 s glue) is regarded as the middle-circuit, ground path of the high-speed differential mode circuit board 30. Therefore, the high-speed differential mode is transmitted in parallel to the DC power supply shown in Figure 2 and Figure 2 to the output power lines 60, 62, 64, 66, 68, 70.

476229 —-J No. 8711402H Year, month, day, day t. 5. Description of the invention (11) 乂 8 8 Ground used 5 4. The ground 5 4 is only designed for DC power supply 8 8, not for high-speed differential modal transmission lines 60, 62, 64, 66, 68, 70. Therefore, its preferred position is as far as possible from the high-speed differential modal transmission lines 60, 62, 64, 66, 68, 70 as shown in Figs. The circuit board 3 of the present invention includes as shown in FIG. 2: an upper shielding surface 2 8 ′, and the upper shielding surface 28 includes a conductive group with a preset group & having a circular cavity opening pattern 8 2; A partial shielding surface 40, a lower shielding surface sample package, a conductive unit of a similar preset combination with the same cavity opening, and a South Speed Differential Modal Transmission Line 60, 62, 64, 66, 68, 70, where these difference collars All of the pairs of virtual grounds 80 are aligned with the center of the opposing cavity opening pattern 8 2 with 4 blades. The conductive unit in the upper shielding surface 28 and the lower shielding surface 40 is preferably a thin film type conductive unit, such as silver glue, which has the mechanical characteristics of repeated bending and mechanical fatigue resistance, and the silver glue is easy to be used for the invention. Intricate shading pattern. The upper shielding surface 28 is located relative to the center of the cavity opening pattern 82, and the lower shielding surface 40 is aligned and preferably not offset. 〇2 is a differential mode. The virtual grounds 80 of the transmission lines 68 and 70 have a pitch of the conductive part in the upper shielding surface 28. In contrast, D3 is the distance between the dummy ground 80 in the upper shielding surface 28 and the elementary unit. After testing various positions of the virtual ground μ, a more appropriate way is to place the differential modal transmission lines 68 and 70 in the same pattern with the same opening pattern in order to generate a slow wave effect. It depends on the curve of the transmission line and the distance between ... and ... shown in Figure 2. For unchanged party =

Page 14 476229 ----- case number 87114025 ___ month_day_amendment____ 5. The preferred combination of the circular hole opening pattern of the cable of the invention (12) is D2 = D3. For the circuit board 3 0, the virtual ground 8 0 to the left of the center of the circle is for the purpose of designing that the transmission lines 68 and 70 have the same timing, because the transmission line 6 8 will increase the distance D2 of the solid area and reduce the transmission line 70 Solid area spacing]) 2. The capacitive effect and slow wave effect related to the cavity opening patterns of the shielding surfaces 28 and 40 can be used to design the impedance of the flexible cable and the transmission time from one end of the flexible cable to the other. If the distance D1 is the maximum size of the openings in the shielding surfaces 28 and 40, in order to effectively prevent electromagnetic radiation, the distance D1 is preferably less than 1/20 through the differential modal transmission line 60, 62, 64, 66, 68, 70 minimum signal wavelength. Therefore, the shielding surfaces 28 and 40 are both effective shielding surfaces. In order to fully understand the following description, it is helpful to establish the χ, γ, and Z coordinate systems in each drawing. The χ and γ axes are located on the horizontal plane shown in Figure 2. Both the upper shielding surface and the lower shielding surface are parallel to the horizontal plane. Similar to 9, the Gui-front modal transmission lines 60, 62, 64, 66, 68, 70 are between the shielding surfaces 28 and 40 and are parallel to the inverse age, and 9S β ® R9 f ^ is on the 敝 planes 28 and 40. On a plane. The difference modal has to lose 60, 62, 64, 66 R8 7π λα ^ ^ L (one, 'Gt), the main orientation of b8, 70 is parallel to the Y axis, as shown in the figure, or half; f · 1? Υ ά 丄 1 ^ One is ten on the X axis, as shown in Figure 1 when you need to make a 90-degree turn. The Z-axis is vertical to the γ red crop ν ′ ΐ J: on the X-axis and the γ-axis, as shown in Figure 3. The position combination of the opening pattern of the hole is related to the bending of the line, and the second insertion s is also related to &; Leli 乐 /, 1 口 5 虎 A 疋 has nothing to do with the bending of the k5 tiger line. Figure 1, Figure 476229 ___ Case No. 87114025 _ Year __g _ Release tail_ 5. Description of the invention (13) 6. The electric cable 30, 130, 372 in Figure 17 belongs to the first type, and Figure 9 shows The electric power lines 210 and 31 of the 14th are the second type. FIG. 2 is a sectional view taken along the line 3-3 in FIG. Solder masking layers are provided on both sides of the shielding surfaces 28 and 40 to protect the conductive unit, and the overall structure will be described below. The first layer is a very thin solder mask. The second layer is a single-sided shielding surface having conductivity, and is defined as a first surface having a first predetermined shielding combination. The second layer is PI (polyammonium ammonium), PET or other equivalent flexible materials. The fourth layer is an adhesive layer. The fifth layer is the transmission line (copper) layer. The sixth, seventh, eighth, and ninth layers are the same as the fourth, third, and second layers, respectively. The eighth layer is a shielding surface 40 having a conductive unit, and is defined as a second surface having a second predetermined shielding combination. Special adhesive flexible materials can be used to combine the third and fourth layers to reduce their thickness, as is the case for the sixth and seventh layers. Flexible cables according to the invention "" have been manufactured. Figure 4 is an enlarged view of part 4--1 in Figure 1 to show how to make a 90-degree turn in the pass line. The gradual solid patterns 72 and 74 are located at the turning point of the electric wire 30, where the solid pattern 72 is located at the upper shielding surface ", and the solid pattern 74 is located at the lower shielding surface 40, as shown in Figs. 4 and 5. There are plugs 50 between the adjacent two pairs of differential transmission lines 64 -66 and 68_70 ° For the larger interval between the adjacent two pairs of differential transmission lines 64-6 6 and 68-70, these plugs 50 are not needed, Because the larger distance between the transmission lines 64-66 and 68-70 will not have much crosstalk phenomenon. If the above is different ------- 87114025 V. Description of the invention When the exact impedance is required in the same opening area as,, and π, different signal lengths require incompatible signal line widths in order to obtain the same impedance value. Therefore, the longer the transmission resistance, 6 4 6 6, the transmission line 6 4-6 6 should be narrower to get the same resistance value. This means that in the solid patterns 72 and 74 in Figure 5, the width of the transmission line ~ 66 is narrower than that of the transmission line 68 -70. Looking at FIG. 6, a masking circuit and a plan view according to a second embodiment of the present invention are shown. They have different diameters. The circular shapes 160, 162, and 164 are different opening patterns of the first ^^ 2, as shown in Figures 6 and 7. The first and second are related to the positions of different people V, mouth 160, 162, 164. The position is closed, and the turning direction of the transmission line is 90, 92, 94, 96, 98, 100, as shown in Figures 6 and 7. Compensation 1 H Shi Er circular opening 160, U2, 164 will cause slow waves The effect is supplemented by eight: ί ί, and compared with the addition of an additional equivalent length compensation method, the electromagnetic radiation is lower than 1,64, and the lack of father. The realization of different circular openings 1 60, 1 62, is better than the single mode. Yes' Design compatible cavity opening area ratio to:;, 94, 96, 98, as shown in Figures 6 and 7, get W and 90, and draw. The length is long, different openings are round 1 6 The ratio of 0 is more ^ ^ 92 The resistance P is μ. If the above-mentioned hollow opening area also needs to be accurately produced. T The transfer lines of different lengths need different and compatible signal line widths S, which are longer: The transmission lines 90, f with different opening and circular 160 ratios have narrower transmission lines 90, 92 required for the same impedance.

4/6229 — Case No. 87114025 V. Description of the invention (15) This shows that the width of the transmission line 90 is narrower than that of the transmission line 94, as shown in Figure 7 and Figure 8 is a sectional view of 8-8 in Figure 7 ^ ^ Read Fig. 9 is a plan view of a shieldable flexible cable and a cable 2 10 according to a third embodiment of the present invention. A cable 2 2 with a turn will have a different transmission time, and a cable with a compatible length (about 30 cm). The circuit board 30 will have a second harmonic mode (910MHz) with a transmission frequency of 25MHz. The cable line 21 is a combination of a square hollow opening pattern 2 50 and a preset portion located at the turn of the cable line 20, with different solid patterns 274, 2 72, as shown in Figure 12-12 of Figure 9. The same as the square space meaning / same, the first and second position combinations related to the mouth pattern 2 50 are the same, and the transmission line 26 0, 262, 2 64, 2 6 6, ι 68 27 of FIG. 9 and FIG. 10 is the same. Bit orientation is irrelevant. FIG. 10 is an enlarged view of the portion 10-10 in FIG. 9 ′ FIG. 11 is a cross-sectional view of 11-11 in FIG. 10. — Figure 12 is an enlarged view of parts 12-12 in Figure 9 without the gradation shell or pattern 272. FIG. 13 is a sectional view of 13_13 in FIG. 12. If the exact resistance is required, the lengths of the transmission lines 2 6 4 and 2 β 6 should be gradually reduced to meet the requirements of resistance ^, because the solid patterns 272 and 274 will increase the capacitance. That is, the widths of the transmission lines 264 and 266 in the actual cases 272 and 274 are smaller than those of the transmission lines, springs 8 and 27, as shown in Figures 12 and 13. Fig. 14 is a plan view of a shielding circuit board according to a fourth embodiment of the present invention. The circuit board 3 10 has different square openings, and its position is

476229 --- Case No. 87114025 _year month day Article __ V. Description of the invention (16) The bending of the road board 3 1 0 is irrelevant. Figure 15 is an enlarged view of parts 5-5 in Figure 14. FIG. 16 is a sectional view of 16-16 in FIG. 15. It should be noted that the square hole opening patterns 3 5 4, 3 5 6 and 3 5 8 all have different square openings. Different square hole opening patterns 3 5 4, 3 5 6, 3 5 8 will trigger the slow wave effect to compensate for its time effect. Compared with the addition of an additional equivalent width compensation method, it has lower unwanted electromagnetic radiation. The simplest way to achieve different cavity opening patterns 3 5 4, 3 5 6, 3 5 8 is to design a compatible cavity opening area ratio for transmission lines of different lengths 29-292, 294_2 96, 2 ^ 8-30 0 . As shown in Figures 14 and 15, the length of the transmission lines 29-292 is feared to be longer, and the ratio of the hollow opening pattern 354 becomes lower. That is, the lower the ratio of the square hollow opening pattern 354, the transmission time of the transmission line 29〇_292 will be known. If the above-mentioned cavity opening area also needs accurate impedance, the transmission lines of different lengths need different and compatible signal line widths. Therefore, the transmission line 290-292 of the ratio of the two-shaped cavity opening pattern 354 becomes smaller: ′-== the transmission line 290-292 required for the same impedance becomes narrower. This

: The width of the non-printed second line 29〇-292 is narrower than that of the transmission line 2 94-29 29, as shown in Figures 14 and 15. < 卞 ′ page M shows a shielded circuit board according to a fifth embodiment of the present invention:: 罟: 人: wherein the circuit board 372 has different square hollow openings, and the bending of the shielded circuit board 372 is related. Fig. 18 is an enlarged view of the illustration. Fig. 19 is a cross-section of 19-19 in Fig. 18. It is important to note that the opening patterns of Fang Yiyun and ηqq'wani industrial hole 46 0, 462, 464 have

19th negative; 476229

5. Description of the invention (17) There are different square openings. Different square cavity opening patterns 46〇 462, 464 will trigger the slow wave effect to compensate for its time effect. Compared with the additional considerable length, it has lower unnecessary electromagnetic radiation. The easiest way to achieve different cavity opening patterns 460, 462, 464 is to design a compatible ratio of cavity opening areas to different lengths of transfer lines 3 6 0 3 6 2 364-366, 368-370. As shown in Figures 17 and 18; the longer the length of the transmission line 360-362, the lower the ratio of the opening pattern 460, that is, the lower the ratio of the square opening pattern 46 0, the lower the transmission line i-360- The transmission time of 362 is shorter. If precise impedance is required in the above-mentioned cavity area, transmission lines of different lengths need signal line widths. Therefore, the longer the transmission line 360-362 with the lower square hole opening pattern is, the more necessary it is to get the same impedance ..., 1364 SfiR? X It is said that the width of the transmission lines 360-362 is narrower than the transmission lines 364-366, as shown in Figure 10. Eight and Figure nineteen are shown. To sum up, when it is known that She Ming has not seen in any journals, the invention of this case is practical and novel, and it shall meet the provisions of the Patent Law. It is not limited to the above-mentioned ones, and should not be used to limit the scope of the invention to the scope of equal changes.

It is only one preferred embodiment of the present invention, and the scope of implementation should be considered. That is to say, any application for modification and modification of the present invention shall be included in the patent of the present invention ^

Page 20 476229 Revised

_ Case number 87114025 V. Brief description of the invention (18) Figure Figure 1 shows a shielding circuit board according to the first embodiment of the present invention. Figure 2 shows an enlarged view of part 2-2 in Figure 1. FIG. 3 is a sectional view taken along 3-3 in FIG. Figure 4 is an enlarged view of part 4-1 in Figure 1 to show how to make a 90-degree turn on the transmission line. 'Production Figure 5 is a cross-sectional view of 5-5 in Figure 4. Fig. 6 shows a shielding circuit board according to a second embodiment of the present invention. Fig. 7 is an enlarged view of parts 7-7 in Fig. 6. FIG. 8 is a sectional view of 8-8 in FIG. Fig. 9 shows a plan view of a shielding circuit board according to a third embodiment of the present invention. Figure 10 is an enlarged view of parts 10-10 in Figure 9. Figure 11 is a cross-sectional view of 11-11 in Figure 10. FIG. 11 is an enlarged view of parts 12-12 in FIG. FIG. 12 is a sectional view of 13-13 in FIG. Θ14 shows a plane of a shielding circuit board according to a fourth embodiment of the present invention. Fig. 15 is an enlarged view of parts 15-15 in Fig. 14. FIG. 16 is a sectional view of 16-16 in FIG. 15. FIG. 17 shows a plane of a shielding circuit board according to a fifth embodiment of the present invention

476229 Case number 87114025 Amendment V. Description of the invention (19) Figure. FIG. 18 is an enlarged view of a portion 18-18 in FIG. 17. FIG. 19 is a sectional view of 19-19 in FIG. 18. Reference number in the drawing 27 transmission line 3 0 circuit board 50 plug 62 transmission line 6 6 transmission line 7 0 transmission line 74 solid pattern 82 hollow opening pattern 9 2 transmission line 96 transmission line 1 0 0 transmission line 1 6 0 circular opening 1 6 4 round Shaped opening 2 1 0 cable 2 6 0 transmission line 264 transmission line 274 solid pattern 2 9 0 transmission line 294 transmission line 2 8 shielding surface 4 0 shielding surface 60 transmission line 6 4 transmission line 68 transmission line 72 solid pattern 8 0 virtual ground 90 transmission line 94 transmission line 98 transmission line 1 3 0 cable 1 6 2 circular opening 168 transmission line 2 50 hollow opening pattern 2 62 transmission line 2 6 6 transmission line 272 solid pattern 2 9 2 transmission line 2 9 6 transmission line

Page 22 476229 Case No. 87114025 A_ Revision V. Description of the invention (20) 2 98 transmission line 3 1 0 cable 3 5 6 hollow opening pattern 3 6 0 transmission line 364 transmission line 368 transmission line 3 7 2 cable 462 hollow opening pattern 3 0 0 transmission line 354 hollow opening pattern 3 58 hollow opening pattern 36 2 transmission line 3 6 6 transmission line 370 transmission line 460 hollow opening pattern 4 64 hollow opening pattern

Page 23 476229 _Case No. 87114025_ Year Month Day Amendment Simple Illustration of Page 24

Claims (1)

476229 _Case No. 87111425_ Modification of Year of the Month_ 6. Application for Patent Scope 1. A circuit board with a shielding surface with a hollow opening pattern to control impedance and transmission time, including: a first preset shielding combination, which is defined in a On the first masking surface, the first preset masking combination includes a first set of preset cavity opening patterns, and the first set of preset cavity opening patterns has a first position combination, and the first position combination includes The position of the first group of preset cavity opening patterns; and a second preset masking combination defined on a second masking surface, the second preset masking combination including a second group of preset cavity opening patterns , And the second set of preset cavity opening patterns has a second position combination, and the second position combination includes positions of the second set of preset cavity opening patterns; wherein the second preset masking combination is a The preset offset is aligned with the first preset shielding combination, and a set of signal transmission units or a plurality of pairs of differential modal signal transmission units are included between the first and second preset shielding combinations. The virtual ground of the signal transmission unit or the differential pair of modal signal transmission units is at a predetermined position relative to the first and second predetermined shielding combinations. 2. The circuit board having a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 1 of the scope of the patent application, wherein each of the first and second preset shielding combinations includes a plurality of conductive units And each of the conductive units has a preset cavity opening pattern; the preset offset is no offset; and the virtual ground is defined as between two signal transmission units in the pair of differential modal signal transmission units. Center line. 3. A circuit board having a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 2 of the scope of the patent application, wherein the first group and the first Page 25 476229 _Case No. 87114025_ Modification of the month of the year _ 6. The two sets of preset cavity opening patterns in the patent application range include cavity openings, which are between the conductive unit, relative to the signal transmission unit or each Two pairs of differential modal signal transmission units to form a first preset distance, and the maximum size of the cavity opening group is smaller than one-twentieth of the wavelength of the highest frequency signal transmitted by the signal transmission unit . 4. The circuit board with a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 3 of the scope of the patent application, wherein the combination of the first and second positions is grid-like. 5. The circuit board with a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 3 in the scope of the patent application, wherein the first and second position combinations are aligned with the corresponding signal transmission unit Position. 6. The circuit board having a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 3 of the scope of the patent application, wherein the first and second sets of preset hollow opening patterns are symmetrical patterns. 7. The circuit board having a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 6 in the scope of the patent application, wherein the preset position of the virtual ground of the pair of differential modal conduction units is determined by the Determined by the center line of the symmetrical cavity opening pattern. 8. The circuit board having a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 1 of the scope of the patent application, wherein the first and second preset shielding combinations and the signal transmission unit may form a Cable (flexible circuit board). 9. A circuit board having a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 8 in the scope of the patent application, wherein the first and second Page 26 H- / OZZV Modification The shielding surfaces are the only ground paths connected together and rolled together. Tian Zuo of the conductive unit of the differential mode pair 10 · As the 9th g shielding surface in the scope of the patent application to control the impedance and the transmission day ": The conductive unit circuit board with the shielding surface of the hollow opening pattern is described, where The first-and second-type Taoyu-type conductive units. ^ The shield with a hollow opening pattern described in item 1 of the Lee Wai = circuit board with impedance and transmission time, wherein each of the first and ^ The pre-e is covered again, and all of them include conductive units having the preset cavity pattern, and the second preset position combination is the same as the first preset position combination. 1 2 · If the scope of patent application The circuit board with a cavity opening pattern shielding surface to control impedance and transfer time described in item 丨 丨 above, wherein the first and the second set of preset cavity opening patterns include cavity openings, which are between the conductivity Between the units, relative to the signal transmission unit or the signal transmission unit of each of the differential modal pairs, a first preset distance is formed; and the maximum size of the cavity opening group is higher than the highest size conducted by the signal transmission unit. frequency The twentieth of the wavelength of the signal is still small. 1 3 · A circuit board with a shielding surface with a hollow opening pattern to control impedance and transmission time as described in item 12 of the scope of patent applications, wherein the first and the first The two preset position combinations are grid-like; and the preset offset is equal to half of the pitch of the zongzi in the direction of the signal transmission unit. 1 4 · As described in Item 12 of the scope of patent application, it has holes. The shielding surface of the opening pattern is a circuit board for controlling impedance and transmission time, wherein the combination of the first and second preset positions is a directional curve aligned to the signal transmission unit. 476229 _Case No. 87111425_ Modification of the month of the year _ 6. The scope of patent application 1 5. The circuit board with a hollow opening pattern shielding surface to control impedance and transmission time as described in item 12 of the scope of patent application, where the The first and the second set of preset cavity opening patterns are symmetrical patterns. 1 6. A circuit board comprising: a first preset masking combination defined on a first masking surface, the first preset masking combination comprising a first set of preset hollow opening patterns and a The first set of preset solid shading patterns, and the first set of preset hollow opening patterns have a first position combination, and the first position combination includes the positions of the first set of preset hollow opening patterns. A set of preset solid masking patterns is located at a preset position; a second preset masking combination is defined on a second masking surface, and the second preset masking combination includes a second position combination A second set of preset hollow opening patterns, the second position combination comprising the positions of the second set of preset hollow opening patterns, and a second set of preset solid masking patterns at the preset positions; and A set of signal transmission units, between the first and second preset shielding combinations, so that the virtual ground of the signal transmission unit or the complex pair of differential modal signal transmission units is relative to the first and second preset Shade The preset position of the combination; wherein the second preset shadow combination is aligned with the first preset shadow combination by a preset offset. 1 7. The circuit board according to item 16 in the scope of the patent application, wherein each of the first and second preset shielding combinations includes a plurality of conductive early elements having the preset cavity opening pattern; the preset The offset is not heavy; the virtual ground is defined as the two signal transmission units in the pair of differential modal signal transmission units. Page 28 476229 _Case No. 87114025_ Years and Months Amendment _ 6. The center line between the scope of patent application; the first and second sets of cavity opening patterns only include a fixed cavity opening pattern; and each of the first The second group of preset solid masking patterns only includes a different solid masking pattern. 1 8. The circuit board according to item 17 in the scope of the patent application, wherein the preset fixed cavity opening pattern includes a plurality of cavity openings between the conductive units to form a first preset pitch To the signal transmission unit, or the signal transmission unit of each differential mode pair; and the maximum size of the cavity opening group is smaller than one-twentieth of the wavelength of the highest frequency signal transmitted by the signal transmission unit . 19. The circuit board according to item 18 in the scope of the patent application, wherein the conductive unit on the first and second shielding surfaces is at a second preset distance relative to the signal conducting unit, and the first A preset pitch, the second preset pitch, and a preset solid shielding pattern are designed to match the impedance and transmission time requirements of the signal transmission unit. 2 0. The circuit board according to item 18 in the scope of the patent application, wherein the combination of the first and second positions is in a grid pattern. 2 1. The circuit board according to item 18 in the scope of the patent application, wherein the combination of the first and second positions is aligned with a corresponding orientation of the signal transmission unit. 2 2. The circuit board according to item 18 in the scope of the patent application, wherein the preset hollow opening patterns of the first and second groups are symmetrical patterns. 2 3. The circuit board according to item 17 in the scope of the patent application, wherein the preset position of the preset solid pattern is at a turn, where it needs to be folded, or at two ends of the signal transmission unit; The preset solid pattern is combined in Page 29 476229 _Case No. 87114025_ Year Month Amendment _ 6. The scope of the patent application The first and the second shielding surface are the same except that the signal transmission unit has different directions to the bit curve. The solid pattern combination And combining the two solid pattern groups is symmetrical to the vertical direction of the bit curve of the signal transmission unit. 2 4. The circuit board according to item 22 in the scope of the patent application, wherein the preset position of the differential mode on the conductive unit or the signal ground of the conductive unit is determined by the center line of the symmetrical cavity pattern. 2 5. The circuit board according to item 16 in the scope of the patent application, wherein the first and second shielding patterns and the signal transmission unit constitute a flexible cable. 2 6. The circuit board according to item 25 in the scope of the patent application, wherein the first and second shielding surfaces are connected together and serve as the sole ground path of the conductive unit of the differential mode pair. 2 7. The circuit board according to item 26 in the scope of the patent application, wherein the conductive units of the first and second shielding surfaces are thin-film conductive units. 2 8. The circuit board according to item 16 in the scope of the patent application, wherein each of the first and second preset shielding combinations includes a conductive unit having the preset cavity pattern; and the second preset It is assumed that the position combination is the same as the first preset position combination. 2 9. The circuit board according to item 28 in the scope of the patent application, wherein the preset cavity opening pattern includes cavity openings, which are between the conductive units, or each difference is given to the signal conducting unit. The signal transmission unit of the modal pair forms a first preset distance; and the maximum size of the cavity opening group is larger than the wavelength of the highest frequency signal transmitted by the signal transmission unit. Page 30 476229 Case No. ^ lUi〇25 Amendment 6. The scope of patent application is one-twentieth still small. 30. The circuit board according to item 29 in the scope of the patent application, wherein the combination of the first and second preset positions is a grid; and the preset offset is equal to the grid in the direction of the signal transmission unit. Half the spacing. 3 1 · The circuit board according to item 29 in the scope of patent application, wherein the combination of the first and second preset positions is aligned to the direction of the signal transmission unit. 3 2 · The circuit board according to item 29 in the scope of the patent application, wherein the preset cavity opening patterns of the first and second groups are symmetrical patterns. 33. The circuit board according to item 28 in the scope of patent application, wherein the preset position of the preset solid pattern is at a turn, a place to be folded, or at two ends of the signal transmission unit; and The preset solid pattern combination on the first and the second shielding surface is the same solid pattern combination except that the signal transmission unit has different directions to the bit curve; and the combination of the two solid pattern groups is symmetrical to the The signal transmission unit is perpendicular to the bit curve. 34. The circuit board according to item 2 in the scope of the patent application, wherein the first masking combination includes a circular cavity opening pattern with a preset grid-like position combination; and the second masking combination is in combination with the second masking The signal transmission unit of the age pair forms a 35th. As described in item 34 of the scope of the patent application, the first: and the second group of the circular cavity opening patterns include a cavity opening, Relative to the signal transmission unit or a preset distance for each of the differential modes; and the maximum size of the hollow open group is higher than the highest frequency expected by the signal transmission unit 476229-Case number 87iun% _ year _- ^ · ------------- VI. The scope of patent application rate L is one-twentieth smaller than the wavelength 36. As described in item 34 of the scope of patent application A circuit board, wherein the first and second shielding patterns and the signal transmission unit constitute a flexible cable. 37. For example, the circuit board of item 36 in the scope of the patent application, wherein the first and second shielding surfaces are connected together, and are regarded as the only ground path of the conductive unit of the differential mode pair. 3 8. The circuit board according to item 37 in the scope of the patent application, wherein the conductive units of the first and second shielding surfaces are thin-film conductive units. 3 9 · If the circuit board described in the second item in the scope of the patent application, wherein each of the first and second preset masking combinations includes an oval cavity pattern having the preset grid-like position combination; and the first The second preset position combination is the same as the _th preset position combination. 〇. As described in the 39th item in the patent scope of the air circuit board 'where the first: and the first group of the oval hollow opening pattern includes a hollow opening, between the electrical unit, Relative to the signal transmission unit or the signal transmission unit for each of the differential modal pairs, a first preset distance z is formed; and the maximum size of the cavity opening group is larger than the highest frequency signal transmitted by the signal transmission unit. Two-tenths of the wavelength is still small. 4 1 · As described in the 39th household circuit board in the scope of the patent application, where the first and second shielding patterns and the numbered conductive unit constitute a flexible cable 口 口 \ as in the scope of the patent application The circuit board according to item 41, wherein the first and second shielding surfaces are connected together, and the travel is regarded as the conduction of the differential mode pair No. 32 4/6229 ----- Case No. 871Uf) 9j __--- §--Positive —___ VI. Patent Application Scope The only grounding path of the unit. 43. The t circuit board according to item 42 in the scope of the patent application, wherein the conductive units of the first and second shielding surfaces are 〆 film-type conductive units. 44. The circuit board according to item 2 in the scope of the patent application, wherein each of the first and first preset masking combinations includes a diamond-shaped hole pattern with a combination of edge-set preset lattice-shaped positions; and the second preset The position combination is the same as the first preset position combination. 4 5 · The circuit board as described in item 44 of the scope of the patent application, wherein the first group and the second group of the oval hollow opening pattern include a hollow opening, which is between the $ electrical units, relative to the signal Transmission unit or the signal transmission unit for each of the differential modal pairs to form a first interval to a predetermined distance; and the maximum size of the cavity opening group is greater than the wavelength of the highest frequency signal transmitted by the signal transmission unit Twenty cents are still small. ° 46. The circuit board according to item 44 in the scope of the patent application, wherein the first and second shielding patterns and the signal transmission unit constitute a flexible electrical winding. 4 7 The circuit board according to item 46 in the scope of the patent application, wherein the first and second shielding surfaces are connected together, and the trip is regarded as the sole ground path of the conductive unit of the differential mode pair. 4 8. The circuit board according to item 47 in the scope of patent application, wherein the conductive units of the first and second shielding surfaces are 〆 film-type conductive units. 4 9 · The circuit board described in the second item in the scope of the patent application, wherein each of the first and second preset shielding combinations includes a square hole pattern having the preset grid-like position combination; and the second The preset position combination is with the first two 476229 _Case No. 87114025_ Year Month Revision _ 6. Scope of Patent Application It is assumed that the position combinations are the same. 50. The circuit board according to item 49 in the scope of the patent application, wherein the first group and the second group of the oval cavity opening patterns include cavity openings, which are interposed between the conductive unit and the signal transmission unit. Or form a first preset pitch for the signal transmission unit of each differential mode pair; and the maximum size of the cavity opening group is 20 times smaller than the wavelength of the highest frequency signal transmitted by the signal transmission unit. One is still small. 5 1. The circuit board according to item 49 in the scope of the patent application, wherein the first and second shielding patterns and the signal transmission unit constitute a flexible cable. 5 2. The circuit board according to item 51 in the scope of the patent application, wherein the first and second shielding surfaces are connected together and serve as the sole ground path of the conductive unit of the differential mode pair. 5 3. The circuit board according to item 52 in the scope of the patent application, wherein the conductive unit of the first and second shielding surfaces is a thin film type conductive unit. 5 4. A circuit board comprising at least: a first predetermined shielding combination is defined on a first shielding surface, the first predetermined shielding combination includes a set of preset hollow opening patterns, and the The set of preset cavity opening patterns has a first position combination, and the first position combination includes the positions of the preset cavity opening pattern; and a set of signal transmission units on a second shielding surface, parallel to the first A shielding surface, so that the virtual grounding of the signal transmission unit or the complex pair of differential mode signal transmission units is at a preset position relative to the preset mask combination Page 34 476229 _ Case No. 87114025 _ year month and month amendment _ 6. Patent application scope 5 5. The circuit board according to item 54 in the patent application scope, wherein the preset shielding combination includes a plurality of conductive units having The preset cavity opening pattern; and the virtual ground is defined as a center line between two signal transmission units in the pair of differential modal signal transmission units. 5 6. The circuit board according to item 55 in the scope of the patent application, wherein the first set of preset cavity opening patterns includes a cavity opening between the conductive units to form a first preset Distance; and the maximum size of the cavity opening group is smaller than one-twentieth of the wavelength of the southernmost frequency signal conducted by the signal transmitting early element. 5 7. The circuit board according to item 56 in the scope of the patent application, wherein the preset position combination is in a grid shape. 5 8. The circuit board according to item 56 in the scope of the patent application, wherein the pre-position combination is aligned with a corresponding orientation curve of the signal transmission unit. 5 9. The circuit board according to item 56 in the scope of the patent application, wherein the preset cavity opening pattern of the group includes a symmetrical pattern. 60. The circuit board according to item 59 in the scope of the patent application, wherein the preset position of the virtual ground of the pair of differential modal conduction units is determined by the center line of the symmetrical cavity opening pattern. 6 1. A circuit board comprising at least: A preset masking combination is defined on a first masking surface, the preset masking combination includes a set of preset hollow opening patterns, and the set of preset The provided hollow opening pattern has a first position combination, the first position combination includes the preset positions of the hollow opening pattern, and a set of preset solid shielding patterns is located at the preset position; and Page 35 476229 _ Case No. 87114025 _ month and month amends_ Sixth, the scope of the patent application a set of signal transmission units, on a second side parallel to the first shielding surface, so that the signal transmission unit or the complex pair difference The virtual ground of the modal signal transmission unit is at a preset position relative to the preset shielding combination. 6 2. The circuit board according to item 61 in the scope of the patent application, wherein the preset shielding combination includes a plurality of conductive units with preset hollow opening patterns; and the virtual ground is defined as the pair of differential modes. The center line between the two signal transmission units in the state signal transmission unit; the set of preset hollow opening patterns only includes a fixed hollow opening pattern; the set of preset solid shielding patterns includes only a solid pattern. 6 3. The circuit board according to item 62 in the scope of the patent application, wherein the preset fixed cavity opening pattern includes a plurality of cavity openings between the conductive units to form a first preset pitch 'Give the signal transmission unit or each pair of differential modal signal transmission units; and the maximum size of the cavity opening group is smaller than one-twentieth of the wavelength of the highest frequency signal transmitted by the signal transmission unit. 6 4. The circuit board according to item 63 in the scope of patent application, wherein the preset position combination is grid-shaped. 6 5. The circuit board according to item 63 of the scope of the patent application, wherein the pre-position combination is aligned with a corresponding orientation curve of the signal transmission unit. 6 6. The circuit board according to item 63 of the scope of the patent application, wherein the preset cavity opening pattern of the group includes a symmetrical pattern. 6 7. The circuit board according to item 62 in the scope of the patent application, wherein the preset position of the preset solid pattern is at a turn, a place to be folded, or at two ends of the signal transmission unit; The preset solid combination is Page 36 476229 _Case No. 87114025 _ Year Month Amendment _ 6. Scope of patent application The first shielding surface. 6 8. The circuit board as described in item 66 of the scope of the patent application, wherein the preset position of the virtual ground of the pair of differential modal conduction units or the preset position of the virtual ground of the signal conduction unit is The center line of the symmetrical cavity opening pattern is determined. Page 37