TW577935B - Device for the transport and wet-chemical or electrolytic treatment of a very thin and flat workpiece - Google Patents

Abstract

A rack for the simultaneous transport of a plurality of thin, flat workpieces in wet-chemical or electrolytic plants is described. The workpiece is suspended and clamped at its comers by means of hangers and/or tension blocks. It is securely retained in the rack without suffering any damage by means of tension elements.

Description

577935 ⑴

(Explanation of the invention should be stated ... The technical field to which the invention belongs, prior art, content, embodiments, and drawings are briefly explained) Technical Field: The present invention relates to a device for transporting and wet chemical and / or electrolytic treatment of ultra-thin A flat workpiece, which is at least two pieces stacked one behind the other, includes a frame, the frame is provided with at least two brackets and a plurality of vertical supporting members, and the two brackets are connected by at least one guide rod. Prior art: For wet chemical or electrolytic processing, if it is a printed circuit board workpiece, especially a thin metal sheet of printed circuit, it is processed in a wet chemical vertical plating equipment or vertical pass type plating equipment, which is transported in a basket If the processing conditions permit, it can be transported and processed simultaneously with a larger number of circuit boards. The basket allows the printed circuit boards to be stacked back and forth. According to the size of the equipment, 10 to 50 circuit boards are stacked at a distance of 10 to 30 mm. If electrolytic treatment is required, the distance depends on the required distance between the cathode and the anode is 1. 〇〇 ～ 300 mm, at this time the anode is arranged between two corresponding circuit boards in the processing bath. In larger equipment, multiple baskets can be arranged side by side, and the spacing between the circuit boards needs to make the processing fluid uniform. Wet circuit boards and ensure good fluid exchange. Generally speaking, the support structure corresponds to a comb or a U-shaped guide ball, and the printed circuit boards entering into it are loosely inserted and spaced at a set distance. This basket is disclosed in U.S. Patent No. 4,385,781. Summary of the Invention: The electronic structure of the printed circuit board continues to shrink in size to reduce the thickness of the circuit board. For specific applications, the printed circuit board must have a flexible structure 577935

(2), and the ultra-thin and elastic printed circuit board is the so-called printed circuit thin metal sheet. Thin printed metal sheets usually have complex contours and can be shaped to save space. This printed circuit metal sheet cannot be fixed by a conventional transport carrier to facilitate wet chemical treatment, metal plating or cleaning, and deform and fall off the guide rod. The thin metal sheet of the printed circuit cannot withstand the fluid pressure discharged from the nozzle, or the fluid pressure caused by the movement on the workpiece, so that the fluid flows through the pores. Those skilled in the art understand that they use a tightening screw or the like to clamp the printed circuit board at least three sides, but this method is not suitable for sensitive printed circuit thin metal sheets. Due to the temperature difference in different treatment tanks, the printed circuit thin metal sheet with plastic cores has a larger expansion change than the metal support, which results in deformation and cracking of the printed circuit thin metal sheet. The pressure of the fluid during processing caused unacceptable dimensional changes in the clamped thin metal sheet of printed circuit. The basic problem to be dealt with by the present invention is to provide a device which can safely bear thin metal printed circuits [and does not damage the sensitive workpiece due to shrinkage or lengthening. The solution to this problem according to the present invention is disclosed in items 1 and 2 of the patent application scope, and other specific embodiments are listed in the attached patent application scope. The solution of building knowledge is shown in detail in a specific embodiment of the rack example of the present invention described later. Brief description of the drawings: Fig. 1 is a view of a frame device according to the present invention, in which a workpiece is fixed in a mounting hole in a positive direction by a tension block. 577935

(3) Figure 2 is along the picture! Sectional view of the frame tension block in the middle straight line. FIG. 3 is a view of the frame device according to the present invention, in which the workpiece passes the tension block

Lost. FIG. 4 is an enlarged view of a frame tension block similar to FIG. 3. FIG. 5 is a cross-sectional view of a frame tension block taken along line v.v in FIG. 4.

Fig. 6 is a cross-sectional view of another force block similar to Fig. 5 taken along a cross-section line similar to that in Fig. 5, and each x piece in # is fastened by a clamping element. FIG. 7 is a view of a rack according to FIG. 1. Fig. 8 is a detailed A cross-sectional view taken along the line-view in Fig. 丨, which shows the way the workpiece is suspended. Implementation: In order to facilitate a better understanding of the specific embodiments shown, specific terms used to replace general items represent structural elements, and the same parameters represent the same elements or have the same functions.

The detachable clamp 3 on the support block 2 is a locking bolt, but other fastening mechanisms such as spring-driven clips, collar levers, eccentrics, and the like can be used. The same situation occurs on the suspension element 10,12, which is a tension roller. This piece can be a hook, a roller with a flange, a groove, or any other part that protrudes from a corresponding support member. And the tension element 13 can suspend and prevent the workpiece from sliding out. As mentioned above, the tension element 13 may be a tension band of an elastic plastic material, a 0-shaped rubber ring, an endless tension spring, a tension spring with a cable eye on both sides, or any other elastic stretching element. Force and suspension at the tail end. In addition, the suspension element 5 used to hang the printed circuit board is a support bar, which reveals that

Later. Similarly, other tensile suspension elements are applicable. The element is not supported + dry and the contour is preferably round, rectangular or tubular. It should be able to securely fix the hook 6, which will be referred to as a hook bolt later in this article. The structure of the hook may be a bolt with a flange, a hook to prevent the workpiece from slipping off, or the like. Fig. 1 is a front view of a rack device according to the present invention, Fig. 7 is a two-dimensional oblique front view of a quite similar rack, and the transport direction corresponding to the processing equipment in Fig. 1 extends toward the figure. The rack can be used for vertical electroplating equipment, where the workpiece is lifted from an electric mining pool and transported to the next processing station. The rack can also be used for vertical pass-type power mining equipment, where the rack is suspended from a key bar and moved past the power mining equipment. At this time, the rack is rotated by 90. And the workpiece 7 that is conveyed through the electric mining equipment ^ in actual operation is a printed circuit board or a printed circuit thin metal sheet has a mounting hole 19 at four corners. The transport member (not shown) moves the rack up and down, and transports the rack of each processing station ', so it uses the bracket 1 to fix the rack. The transverse guide rods 4 on the frame between the brackets are fastened to the cross beam 20, which is perpendicular to the drawing plane and is firmly connected to the bracket 1. The support block 2 is mounted on the guide rod 4 of the mobile bearing, and the support block is fixed at the mounting hole 19 by the locking bolt 3 after being accurately adjusted. Fig. 8 is a structure of a workpiece suspension, which is an enlarged view of Fig. 1 and a cross-sectional view taken along a line M-M. Generally speaking, two support blocks are used for stacking or a plurality of workpieces for each printed circuit board. At least one of the support blocks is a sliding bearing, and the second support block can be fixed in a non-sliding manner. At this time, there is no need to center the guide bar 4. Hang workpieces of different widths. In consideration of larger printed circuit board stacks, the guide rods 4 should be used in pairs and arranged parallel to the horizontal plane at a distance of 50 to 500 mm. If multiple stacking systems are configured side by side and run simultaneously 577935

(5) Sending, that is, increasing the output, four or more supporting blocks can be fastened side by side on the guide rod 4, at this time each supporting block needs an additional vertical supporting member 11.

For the printed circuit board to be fastened, the support bar 5 is located on the side of the support block 2. A hook bolt 6 is located at a corresponding bottom end of the supporting beam. In order to fasten the workpiece 7, a mounting hole 19 (mostly provided with a positioning hole) for this purpose is arranged above the bolt. "Currently printed circuit boards or printed circuit thin metals The sheet is hung loosely by the hook bolt 6. In order to prevent the workpiece from sliding away from the hook bolt 6, the configuration of the bolt is stretched diagonally upwards from the supporting crossbar 5, so the angle of the supporting crossbar is about 5 ° to 45 °. In addition to the inclined configuration, the hook bolt 6 also has a flange, which prevents the workpiece such as the printed circuit board from sliding, and the mounting holes 19 are located at the bottom edge of the workpiece.

The vertical support member 11 is fastened near the outer end of the cross beam 20, and the two members are fitted to one side of the stack. The supporting member is composed of two vertical metal rods located on the side of the stack, as shown in FIG. 1, which has a cross-shaped connection 21 at the bottom end. If the material of the support member 11 is appropriate and the tension roller 12 'cross-shaped connection 21 can be configured accordingly, its special advantage is that when the anode is arranged between printed circuit boards, the anode must be on the corresponding printed circuit board. The connection between the stack and the outside of the stack when the rack is lowered into the plating bath. For additional support, the vertical support member 11 can be connected to the cross member at the center and / or bottom (not shown), the cross member has the same orientation as the cross beam 20, and at least one force roller 12 is arranged on one Corresponds to the bottom end of the vertical support member 11. At the lower side, the work piece 7 is fixed on the left and right sides with the corresponding tension blocks 8 and the tension block 8 is shown in detail in Fig. 2 taken along the section line Π-Π in Fig. 1, and the material -10-

The quality can be plastic or metal, depending on the requirements of the wet chemical method used. If it is necessary to use the rack for electroplating, a metal rack can be placed on the outer electrical insulation. For each workpiece to be processed, a fine hole 22 is ground in the tension block 8. To simplify the illustration, only five pores corresponding to five thin metal sheets of the printed circuit are shown, and the number of pores is usually more than five. Depending on the number of devices to be manufactured, the average value can be 10 to 50 thin metal sheets of printed circuits, and the width of the pores 22 must be such that the processing fluid does not collect in the gap between the pore wall and the workpiece 7, This results in an increase in the total amount of processing fluid from one plating bath to another. Generally, if the width exceeds 5 mm, no fluid flows. The distance from one workpiece 7 to the other workpiece 7 depends on the processing required, but in any case, the distance must be sufficient to allow the fluid to be transported fast enough to shorten the processing time. The hole inserted into the tie rod 9 passes through the tension block $ in the longitudinal direction, so the workpiece 7 is fixed by the mounting hole 19. In order to facilitate the threading, the tie rod 9 has a sharp front end, which surprised me that the threading did not cause any problems in actual operation. To achieve this, the operator laterally pushes the tension block 8 near the support crossbar 5 into the slack hanging and evenly spaced upper part of the circuit board stack, and then moves it downward until it reaches the lower mounting hole 9. Due to the guiding characteristics of the fine holes 22 in the tension block 8, it can push the tie rod 9 through the tension block and the workpiece stack, and then use the safety device 14 to fix the tie rod 9 to prevent it from slipping away during transportation. The device 14 consists of a threaded tie rod and a nut ', or, for example, a split bolt or a retaining ring. The same procedure is performed on the second bottom edge of the workpiece. Finally, the elastic tension belt 13 is suspended above the tension roller 10 on the tension block 8 at the bottom of the side, and is then suspended on the tension roller 12 by using the downward pulling force. Use of four tensions in the example shown -11 r

577935 belt ’, two tension belts are arranged on the left and right sides on the back of the stack, and the other two tension belts are arranged on the front of the stack, as shown in Figure 1. If the tension roller 10 is not arranged on the front side, the hook of the tension block 8 protrudes from the bottom of the tension block 8 and the center is arranged at the longitudinal side, and the printed circuit board stack is fixed only by two tension bands. 3 The hook Not shown in the drawing. In the specific embodiment shown, the tension roller 12 must be disposed at the center of the vertical support member 11 on both sides, and the tension band 13 must securely fix the workpiece on one side and the mounting holes on the other side 丨9 is not damaged, that is, not split. If only two tension belts 13 are used, the tension of each tension belt becomes larger as the number thereof decreases. If the workpiece to be processed is relatively thin, it can be reinforced with a surrounding metal covering to prevent the mounting hole from being damaged under tension. For example, the elastic and chemically stable plastic materials of EPDM and rubber compounds or springs made of stable materials are suitable for tension bands, which must consider the activity of the chemicals used. The processed workpieces are unloaded in reverse order, first remove the tension band 3, then remove the safety device 14, and finally pull away from the tie rod 9. When the tie rod is removed, the operator supports the tension block 8 with his hand to prevent it from falling. When the tie rod 9 is completely pulled away, the tension block 8 can be removed. When the two tension blocks have been removed, it is easy to lift the circuit board off the upper hook bolt. Right * When the work piece 7 is a relatively thin printed circuit metal sheet, the mounting hole 9 may be cracked. If there is no corresponding hole around the printed circuit metal sheet, it can use the frame shown in FIG. 3 of the present invention. Device: In this specific embodiment, the improved tension block 18 is used to replace the hook bolt 6 on the supporting crossbar 5, and the tension is -12-577935.

⑻

The block 18 is firmly fastened to the supporting crossbar 5. If it is a sensitive workpiece 7, the second top tension block 18 moves in a horizontal direction on the supporting crossbar 5 through an elongated hole (not shown), and Since the tension band 13 is stretched outwards, since the tension band compensates the corresponding length, we confirm that the top end of the thin metal sheet of the printed circuit is not deformed in the horizontal position. Compared to the rack of FIG. 1, it provides a support cross bar 5 on each support block 2 at the stacking sides, but for a structure-reinforcing bracket, it uses two support cross bars 5 at each side. This type of tension block 18 is used at the bottom of the workpiece instead of the tension block 8. Figure 4 details the modified tension block 18 on the bottom right side. In order to show more clearly, the printed circuit thin metal sheet 7 shown in the figure has a small height, and the longitudinally arranged tension block 18 has two longitudinal through holes so as to tighten the tie rod 9.

Depending on the number of thin metal sheets 7 of the printed circuit to be fastened, the tension block 18 is composed of a plurality of discontinuous clips 23 shown in FIG. 5 and is guided and fixed by two tie bars 9. The anode is represented by the number 15. In this specific embodiment, because the thin metal sheet of the printed circuit is clamped and not tightened, the tie rod 9 is not removed for loading and unloading. The workpiece 7 is firmly fixed to the tension by the clamping device. On the block 18, as shown in FIG. 1, the tensioning action of the tie rod 9 is completed by threads and wing nuts, quick closing parts of centrifugal levers, collar levers or other mechanisms suitable for clamping. To open the clip 23, the clamping device on the tie rod 9 needs to be in a relaxed state, and a spring element 24 composed of a spring or an elastic disc is inserted between the clips 23 to facilitate opening. In order to simplify Fig. 5, the spring element is shown only under the two thin metal sheets of the printed circuit, and the spring element 24 correspondingly disposed between two adjacent clips 23 can be disposed on the tie rod 9 and assist in opening. When the tie rod 9 is released and the circuit board is removed, that is, when the clamping action is stopped, the spring element is stretched and • 13 · 577935

(9) Expand the gap between the two clamps 23 to the extent allowed by the tie rod 9. The workpiece is not clamped between the real clamps 23, it is clamped between the small-sized clamps 17, which are fixed to the clamps 23, FIG. 5 is a side sectional view of the clamps 17: view. The opposite support 16 fixes the workpiece to the small-sized clamping block 17 and is arranged diagonally with respect to the tension block 18 on the clamping block 17. In order to make the clamping of the workpiece as gentle as possible, the small-sized clamping block 17 and the relative support member 16 may be made of elastic materials, such as soft rubber and soft plastic materials. For the electrolytic treatment, the materials of the small-sized clamping block 17 and the clamping member 23 must be conductive, and at least in the contact area. The small-sized clamping block 17 and the opposite supporting member 16 may be composed of a belt in FIG. 5 or a ring in FIG. 3. If the thin metal sheets of the printed circuit to be transported all have almost the same thickness, only a tie rod 9 provided with a clamping mechanism is sufficient to change the clamping length of the rod, and the second tie rod 9 is still the previously established adjustment status. Since the entire circuit board stack is simultaneously clamped by the tie rods 9 and the circuit board is not suspended in the hole from the hook bolt, an additional auxiliary device (not shown) must be used for loading and unloading. The auxiliary structure must be such that the thin metal sheet of the printed circuit is inserted into the pores of the upper tension block 18 one by one from the bottom and kept in this position without sliding away from the pores until it is stretched. In the simplest case, since the work piece 7 is harder and is a non-sliding flat area under the frame, the pitch varies depending on the height of the printed circuit board. Flat plates with V-shaped grooves are spaced in parallel by printed circuit board stacking, which is more suitable for this purpose. When the workpiece is clamped at the top, the lower tension block 18 can be stacked close to the printed circuit board sideways and locked. The structure of the lower clamp member 23 corresponds to the structure of the upper clamp member 23, which is only upside down and has a tension roller 10. When the left and right sides of the workpiece are clamped in the tension block 18, the tension band will hang.

(ίο) 松 ’Therefore the printed circuit board is securely fixed in the rack. Fig. 6 is a cross-sectional view similar to Fig. 5 of a plurality of specific embodiments, which clamps the work piece 7 in the tension block 18; In contrast to the above example, the workpiece is individually clamped and the tension block 18 is a single piece and does not consist of different components. The screw holes in the tension block 18 and the complementary loosening screws 28 are examples of cooperation with various workpieces. During the tightening process, the screws 28 directly apply pressure to the workpieces. In another embodiment, the eccentric 31 applies pressure to the workpiece. In another embodiment, the clamping rod 26 carried by the tension screw 28 applies pressure to the workpiece. As described herein, the corresponding supporting member at this time is a small clamping block 17. If the clamp lever 26 is used, the spring element 27 can assist in opening the clamp lever 26 and is a compression spring, which is made of elastic plastic material or the like. The advantage of this specific embodiment is that it is not necessary to fix the workpiece 7 by the auxiliary structure of the tie rod until the clamping is started, so it is particularly suitable for the upper tension block 18. As described above, the anode 15 in FIG. 5 is shown with a dashed line to facilitate explanation. In the record, the positive electrode is opposite to the anodized workpiece 7. If the metal of the rack is pre-electrolyzed, at least the small clamp block 17 above must be conductive and connected to the negative pole of the DC power supply. The block 18 or the clip 23 is electrically connected to the support bar 4 on the support frame 25 (FIG. 1) to complete it. At this time, the guide bar 4 should be conductive. The support frame 25 is connected to the power source through a conductive path guide 30. If the workpiece is to be engraved, the workpiece must be connected to the positive pole of the power source and the corresponding negative pole. The frame according to Figs. 1 and 3 can be an assembly, which uses a support bar $ and a hook bolt 6 to suspend the work piece at one top edge and the tension blocks at the other three corners -15- 577935

⑼ 18, as shown in Figure 3, it is conducive to hanging the workpiece 7 and avoid the disadvantages of the hard upper hanging in the figure. In particular, an upper tension block 18 for individually clamping the workpiece is provided according to FIG. 6 to cooperate with the lower tension block 18 in FIG. 5 to clamp the workpiece 7 into a complete body. Tension blocks of other constructions can be used to clamp the workpiece. Figure 6 shows different constructions. 'For example, the circuit board is individually clamped in the tension block 18 by clamping screws 28 arranged diagonally, or the clamping rod 26 or eccentricity is used. 3 丨 Clamp, tension at this moment

The block is a single piece as shown in FIG. 6, and the clamping rod and the clamping screw are used to replace the tie rod. Schematic representation of symbols

1 Bracket for transport rack 2 Support block 3 Locking screws for support block 4 Guide bar for support block 5 Support bar for work piece 6 Hook bolt for work piece 7 Flat work piece (printed circuit board, printing Thin metal sheet of circuit) 8 Tension block 9 Tie rod 10 Tension roller on the tension block 11 Vertical support member 12 Tension roller on the support member 13 Tension belt 14 Safety device 15 Anode 16 Relative support 16 · (12) Small clamp block The cross-shaped connection of the beam on the mounting hole bracket in the tension block workpiece with the clamp is used to receive the fine hole clamp of the printed circuit board. The spring element support for the clamp. The clamp rod. The spring element for the clamp rod. Guide eccentric

Claims (1)

Patent application No. 091121000, the owner of the patent claims the replacement of the patent scope (October 1992) m y!, +. I ㈣ Patent application scope 1 · A device for transporting and wet chemical and / or electrolytic treatment of ultra-thin flat workpieces, at least two pieces of workpieces are stacked one behind the other, and the frame of the device is provided with at least two brackets (1) and A plurality of vertical support members (ιι), the bracket is connected by at least one guide rod (4), and the device is characterized by: at least two support blocks (2) 'which are provided by a locking mechanism on the at least one guide rod (4) ( 3) Lock it and fasten at least two tension blocks (8) with a first suspension element (10) to the supporting member (5) 'with a hook (6) on one side for fixing the workpiece On the other hand, a tie rod (9) that is engaged in the workpiece mounting hole (19) is fastened to the second suspension element (12) on the vertical support member (11), and the tension element ( 13) Fasten the first suspension element (10) and the second suspension element (12) to fix the workpiece in the frame under tensile load. 2. A device for transporting and wet-chemical and / or electrolytic treatment of ultra-thin flat workpieces. The workpieces are arranged at least two pieces stacked one behind the other. The frame of the device is provided with at least two brackets (1) and a plurality of vertical supporting members. (11) 'The bracket is connected by at least one guide rod (4), and the device is characterized by: at least two support blocks (2), which are locked by a locking mechanism (3) on at least one guide rod (4) and There are at least two gift members (5), at least one tension block (丨 8) above and below the corresponding suspension element (10) is fastened on the support member, the tie rod (9) passes the tension block longitudinally and is provided with a clip The clamping device clamps the printed circuit board in position. At least one second suspension element (丨 2) is matched with each supporting member (11), and the tension element (13) is suspended by the suspension element (10, 12). Stretchable fixation of workpiece under tensile load Continued on the scope of the patent application * 4. 6. 8. According to the item 1 of the scope of the patent application, the good y L is placed on the basis of the dream of the scope of the patent application. From: Ergan (5) 'and its bolt has a -flange at the tail end, which is farthest from the support crossbar to prevent the workpiece from sliding. 3The application for the special "Surrounding of the second item, its characteristics are The tension block ⑽ :: away clip (23) uses a small lost block (17) and a relative supporting piece (16) to fix the workpiece. The device according to item 2 of the scope of patent application is characterized by the conductive small clip The block (17) and the opposite support (16) are connected to the power source by a conductive clamp (⑺) and / or a tension block (18), a selection block (2), and a guide rod (4). Or item i of item 7, characterized in that the material of the conductive small clamping block (17) and the relative support (16) is plastic. 9 · According to the first, second, third or sixth item of the scope of patent application The device is characterized by the tension block (8, 18), in which the processing fluid can flow through different pores (22) to receive the workpiece without being disturbed. 10 · root The device described in the patent application No. 丨, 2, 3 or 6 is characterized in that the tie rod (9) is fitted with a safety device to prevent the tension block (8, 18) or the workpiece (7) from sliding unintentionally. Or loosen, the safety device consists of threads and fastenings The nut is divided into 0. The bolt or fixing ring is tensioned by an eccentric or a set of levers. 11 According to the patent application scope, the second or sixth rod (9) cooperates with each tension block (18). Fastening, the two tie rods are equipped with a clamping mechanism, which is the effective length of the rod. Tight and complicated 12. The device according to item 2 of the scope of patent application is characterized by the tension block ⑽ There is a -clamping device 'for discontinuously clamping the workpiece ⑺ directly into the tension block (18). The clamping device is provided with clamping screws (28) and / or eccentric crying (31). °° 13 · The device according to item 2 of the scope of patent application, characterized in that the tension block (丨 8) is provided with a clamping device that cooperates with each workpiece. The clamping device is composed of clamping screws (28), spring elements (27 ) And clamp rod (26).