JP2010056171A - Device and method for manufacturing circuit board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method of manufacturing a circuit board attaining scan at the same distance pitch and almost the same energy quantity per scan as those in an isokinetic state even in accelerated and decelerated states by a simple control operation. <P>SOLUTION: The device includes a laser oscillator 1, a scanner 2 and a laser scan control unit 3. The scanner 2 performs scan with pulsed laser light by sequentially shifting the state to four states of the accelerated, isokinetic, decelerated and stopped states. The laser scan control unit 3 decides that the scanner 2 has been shifted from which state of the four states to the next state. When it decides that the scanner has been shifted to the accelerated or decelerated state, it generates pulse frequency information so as to attain almost the same distance pitch and energy quantity per scan as those for scan in the isokinetic state and transmits the information to the laser oscillator. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a circuit board manufacturing apparatus for manufacturing a circuit board by scanning a pulsed laser on the surface of a substrate on which a metal thin film is formed, removing unnecessary portions of the metal thin film, and forming a circuit on the substrate. It relates to the manufacturing method.

  Conventionally, a method of manufacturing a circuit board by scanning a pulsed laser on the surface of a substrate on which a metal thin film has been formed using a scanner and forming a circuit on the substrate by removing unnecessary portions of the metal thin film has been known. It has been.

  However, when scanning a pulsed laser using a scanner, it is performed while sequentially shifting to four states of a stop state, an acceleration state, a constant speed state, and a deceleration state. The scanning speed becomes slower than the state. Therefore, in the acceleration state and the deceleration state, as in the case of the constant velocity state, if the pulsed laser is oscillated at regular intervals (see FIG. 8B), the pulsed laser is oscillated in the acceleration state and the deceleration state. The distance pitch becomes smaller than that in the constant speed state (see FIG. 8A).

In order to solve this problem, for example, the scanning speed at each part on the scanning path is calculated from the acceleration / deceleration characteristics of the scanner and the scanning content based on the CAD data regarding the scanning path, and the obtained scanning speed is determined. In order to control the pulse frequency generated by the laser oscillator, there has been proposed (see Patent Document 1).
JP 2002-290007 A

  However, in Patent Document 1, since the scanning speed is calculated from the scanning contents based on the CAD data related to the scanning path, it takes time to accurately convert the scanning contents into data, and for example, every time the scanning path is different. In addition, the scanning speed must be calculated based on the CAD data, and there is a problem that the operation for calculating the scanning speed is complicated and time-consuming and sometimes difficult to control.

  The present invention provides a circuit board manufacturing apparatus and a manufacturing method thereof capable of performing scanning with simple control, in the acceleration state and the deceleration state, at the same distance pitch as in the constant speed state and with substantially the same amount of energy per time. For the purpose of provision.

  In order to solve the above-mentioned problems, the invention of claim 1 is a circuit in which a pulsed laser is scanned on the surface of a substrate on which a metal thin film is formed, an unnecessary portion in the metal thin film is removed, and a circuit is formed on the substrate. A circuit board manufacturing apparatus for manufacturing a substrate, comprising: a laser oscillator that oscillates the pulsed laser; a scanner that receives the pulsed laser from the laser oscillator and scans the surface of the substrate with the pulsed laser; and The scanner and a laser scanning controller communicable with the laser oscillator. The scanner, during the scanning, accelerates the pulsed laser while accelerating it from the stopped state, and scans the pulsed laser from the accelerated state at a constant speed. Whether the pulsed laser is scanned at a constant speed, the pulsed laser is decelerated from the constant speed state, and the pulsed laser is decelerated. The laser scanning control unit is configured to shift the scanner based on the scanning speed information regarding the scanning speed in each of the four states and a preset threshold value. When it is determined whether or not the state has shifted from one of the four states to the next state, and when it has been determined that the state has shifted to the acceleration state or the deceleration state, Provided is a circuit board manufacturing apparatus which generates pulse frequency information so as to be substantially the same as a distance pitch and an energy amount per one time and transmits the pulse frequency information to a laser oscillator.

  According to a second aspect of the present invention, the scanner includes a first-axis scanner and a second-axis scanner that scan in the directions of two axes orthogonal to each other when the surface of the substrate is scanned with a pulsed laser. Each of the first-axis scanner and the second-axis scanner scans the pulsed laser in each axial direction while sequentially shifting to the four states, and the scanning speed information in the acceleration state and the deceleration state is the first A circuit characterized in that it is combined scanning speed information obtained by combining first axis scanning speed information relating to the scanning speed of the single axis scanner and second axis scanning speed information relating to the scanning speed of the second axis scanner. This is a substrate manufacturing apparatus.

  According to a third aspect of the present invention, the scanner includes a first-axis scanner and a second-axis scanner that scan in the directions of two axes orthogonal to each other when the surface of the substrate is scanned with a pulsed laser. Each of the first-axis scanner and the second-axis scanner scans the pulsed laser in each axial direction while sequentially shifting to the four states, and the scanning speed information in the acceleration state and the deceleration state is the first Of the first-axis scanning speed information related to the scanning speed of the single-axis scanner and the second-axis scanning speed information related to the scanning speed of the second-axis scanner, the one indicated by the larger value is used. The circuit board manufacturing apparatus is characterized by the above.

  According to a fourth aspect of the present invention, the scanner includes a first-axis scanner and a second-axis scanner that perform scanning in the directions of two axes orthogonal to each other when the surface of the substrate is scanned with a pulsed laser. Each of the first-axis scanner and the second-axis scanner scans the pulsed laser in each axial direction while sequentially shifting to the four states, and the scanning speed information in the acceleration state and the deceleration state is the first A circuit board having either one of first-axis scanning speed information relating to the scanning speed of the single-axis scanner and second-axis scanning speed information relating to the scanning speed of the second-axis scanner It is a manufacturing apparatus.

  According to a fifth aspect of the present invention, the threshold value is a first threshold value used for determining whether or not the vehicle has shifted from the stopped state to the accelerated state, and determines whether or not the vehicle has shifted from the accelerated state to the constant speed state. The second threshold value used when performing the determination, the third threshold value used when determining whether or not the transition from the constant speed state to the deceleration state is performed, and the second threshold value used when determining whether or not the transition from the deceleration state to the stop state is performed. The circuit board manufacturing apparatus includes a fourth threshold value.

  The invention according to claim 6 is the circuit board manufacturing apparatus, wherein the scanning speed information is a change amount of the speed per predetermined time.

  The invention according to claim 7 is the circuit board manufacturing apparatus, wherein the scanning speed information is an absolute value of the change amount.

  In the invention of claim 8, the scanning speed information is an amount of change in speed per predetermined time, and the laser scanning control unit determines that the scanning speed information has shifted to an acceleration state or a deceleration state. The circuit board manufacturing apparatus is characterized in that a scanning distance per predetermined time is calculated on the basis of the frequency and the pulse frequency information is generated based on the scanning distance.

  According to the ninth aspect of the present invention, the laser scanning control unit is capable of accessing a database storing a distance pitch for oscillating a pulsed laser in a constant speed state and an energy amount per time, and in a constant speed state. When it is determined that the transition has been made, the distance pitch for oscillating the pulsed laser and the amount of energy per time are obtained from the database and transmitted to the laser oscillator, and the pulse frequency information is obtained at a constant speed obtained from the database. The circuit board manufacturing apparatus is characterized in that the circuit board is generated based on a distance pitch in a state and an energy amount per one time.

  The invention according to claim 10 sequentially shifts the laser oscillator for oscillating the pulsed laser and the pulsed laser from the laser oscillator into four states of an acceleration state, a constant speed state, a deceleration state, and a stop state. Using a circuit board manufacturing apparatus equipped with a scanner that scans the surface of the substrate and a laser scanning control unit that can communicate with the scanner and the laser oscillator, a pulsed laser is formed on the surface of the substrate on which the metal thin film is formed. And a circuit board is manufactured by removing unnecessary portions of the metal thin film and forming a circuit on the substrate, wherein the laser scanning control unit has the four states in each of the four states. Whether the scanner has shifted from one of the four states to the next based on scanning speed information relating to the scanning speed and a preset threshold value When it is determined that the state has shifted to the acceleration state or the deceleration state, the pulse frequency information is set so that it is substantially the same as the distance pitch and the amount of energy per time when scanning in the constant speed state. The above-described problems are solved by providing a method of manufacturing a circuit board characterized by performing a process of generating and transmitting to a laser oscillator.

  According to claims 1 and 10 of the present invention, the laser scanning control unit is based on the scanning speed information regarding the scanning speed in each of the stop state, the acceleration state, the constant speed state, and the deceleration state, and a preset threshold value. It is determined whether the scanner has shifted from one state to the next.

  Accordingly, the determination of the shift by the laser scanning control unit does not have to be performed based on the scanning contents based on the CAD data as in the conventional case, and the determination can be facilitated and the control can be facilitated.

  According to the second aspect, the scanning speed information in the acceleration state and the deceleration state includes the first axis scanning speed information relating to the scanning speed of the first axis scanner and the second axis scanning relating to the scanning speed of the second axis scanner. The combined scanning speed information is obtained by combining the speed information.

  Accordingly, the scanning speed information can include the first axis scanning speed information of the first axis scanner and the first axis scanning speed information of the second axis scanner, and the scanning speed information is reliable. Can be expensive.

  According to the third aspect of the present invention, the scanning speed information in the acceleration state and the deceleration state includes the first axis scanning speed information regarding the scanning speed of the first axis scanner and the second axis scanning regarding the scanning speed of the second axis scanner. Of the speed information, the value indicated by each is larger.

  Thereby, sensing of scanning speed information can be stabilized, control can be simplified, and control can be facilitated.

  According to the fourth aspect of the present invention, the scanning speed information in the acceleration state and the deceleration state includes the first axis scanning speed information regarding the scanning speed of the first axis scanner and the second axis scanning regarding the scanning speed of the second axis scanner. One of the speed information is used.

  Thus, for example, even when the first-axis scanner and the second-axis scanner are simultaneously scanned, it is sufficient that one of the first-axis scanning speed information or the second-axis scanning speed information is used as the scanning speed information. , Can simplify the control.

  According to the fifth aspect, the threshold value is composed of four values of the first threshold value to the fourth threshold value. Thereby, it is possible to reliably determine whether or not the current state has shifted to the next state.

  According to the sixth aspect, the scanning speed information is a change amount of the speed per predetermined time. Thereby, the amount of change in the stopped state and the amount of change in the constant speed state can be made substantially the same. Therefore, for example, the same numerical value can be used for the first threshold value and the second threshold value, and the same numerical value can be used for the third threshold value and the fourth threshold value, and two types of threshold values can be used. Therefore, the control can be simplified and the control can be facilitated.

  According to the seventh aspect, the scanning speed information is an absolute value of the change amount. As a result, the change amount in the stop state and the change amount in the constant speed state can be made substantially the same, and the change amount in the acceleration state and the change amount in the deceleration state can be made almost the same.

  Therefore, the same numerical value can be used for all of the first threshold value to the fourth threshold value, the control can be further simplified, and the control can be facilitated.

  According to the eighth aspect, the laser scanning control unit calculates the scanning distance per predetermined time when it is determined that the state has shifted to the acceleration state or the deceleration state. Then, pulse frequency information is generated based on the scanning distance information.

  Thereby, in any region of the constant velocity state, the acceleration state, and the deceleration state, the pulse laser can be oscillated from the laser oscillator with the same energy amount per time at the same distance pitch and scanned on the substrate.

  According to the ninth aspect of the present invention, the laser scanning control unit can obtain a distance pitch for oscillating the pulsed laser in a constant speed state and a database storing the amount of energy per one time.

  As a result, the laser scanning control unit does not need to calculate the distance pitch and the amount of energy per oscillation for oscillating the pulsed laser in a constant speed state, and the operation of the laser scanning control unit can be reduced and control is easy. Can be a thing.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a circuit board manufacturing apparatus according to an embodiment of the present invention.

  The circuit board manufacturing apparatus according to this embodiment includes a laser oscillator 1, a scanner 2, and a laser oscillation control unit 3 connected to the scanner 2 and the laser oscillator 1 so as to communicate with each other.

  In this embodiment, the laser oscillator 1 is provided with a laser oscillator controller 11, and is controlled by the laser oscillator controller 11 to oscillate at the pulse frequency of the pulsed laser, the amount of energy per one, and the like. It has come to be.

  Further, the laser oscillator controller 11 of this embodiment is connected to the pulse frequency in the constant speed state, which will be described later, the distance pitch at the pulse frequency, 1 of the pulsed laser, from the main controller 10 via the laser oscillation control unit 3. Information on the amount of energy per rotation is received, and the oscillation of the pulsed laser in the laser oscillator 1 is controlled based on the received information.

  Specifically, the main controller 10 stores a pulse frequency with respect to a speed in a constant speed state, which will be described later, and a distance pitch at the pulse frequency in association with each other, and information such as an energy amount per time of the pulsed laser. Has a stored database.

  The main controller 10 transmits information such as the pulse frequency and the amount of energy per one time to the laser oscillator controller 11 via the laser oscillation control unit 3. The laser oscillator controller 11 controls the oscillation of the pulsed laser in the laser oscillator 1 based on the received information.

  The scanner 2 receives the pulsed laser from the laser oscillator 1 and scans the surface of the substrate 100 that is the processing surface of the pulsed laser. This scanner 2 includes two first-axis scanners 21 and second-axis scanners 22 that are rotatably held and moved, and a first driver 23 and a second driver that rotate the first-axis scanner 21. A second driver 24 for rotating the shaft scanner 22 and a driver controller 25 are provided.

  The first-axis scanner 21 and the second-axis scanner 22 are composed of reflection mirrors that receive and reflect the pulsed laser from the laser oscillator 1.

  The first driver 23 applies a voltage to the first axis scanner 21 to rotate the first axis scanner 21. And with the rotation, the first-axis scanner 21 changes the angle with respect to the surface of the substrate 100. Thereby, the first-axis scanner 21 can scan the pulsed laser in the X-axis direction, which is one direction on the surface of the substrate 100, according to the rotation (angle) of the first-axis scanner 21. It is like that.

  The speed of the movement of the first-axis scanner 21 is as follows from the position command applied to the first-axis scanner 21 from the first driver 23, as shown in FIG. The vehicle moves while sequentially shifting to four states of a stopped state 20a, an accelerated state 20b, a constant speed state 20c, and a decelerated state 20d.

  The acceleration state 20b is a state in which the movement of the first axis scanner 21 is gradually accelerated. The constant speed state 20c is a state in which the movement of the first axis scanner 21 becomes constant speed. The deceleration state 20d is a state in which the movement of the first-axis scanner 21 is gradually decelerated.

  The movement speed of the first-axis scanner 21 is proportional to the scanning speed of the pulsed laser that scans the substrate 100 by the first-axis scanner 21. Accordingly, the scanning speed of the pulsed laser is zero in the stop state 20a, gradually increases in the acceleration state 20b, becomes constant in the constant speed state 20c, and gradually decreases in the deceleration state 20d.

  The second driver 24 applies a voltage to the second-axis scanner 22 and rotates the second-axis scanner 22. And with the rotation, the second axis scanner 22 changes the angle with respect to the surface of the substrate 100. Accordingly, the second axis scanner 22 scans the pulsed laser in the Y-axis direction orthogonal to the X-axis direction on the surface of the substrate 100 in accordance with the rotation (angle) of the second-axis scanner 22. It can be made to.

  The rest of the second driver 24 has the same configuration as that of the first driver 23, and the second driver 24 also uses the second driver 24 in the second axis scanner 22 as shown in FIG. Then, it moves while sequentially shifting to four states of an acceleration state 20b, a constant speed state 20c, and a deceleration state 20d, and the pulsed laser is scanned under the movement.

  As shown in FIG. 2A, the driver controller 25 increases the voltage (speed) increase amount (ΔV1 = Vn−Vn−) per minute time (predetermined time) applied from the first driver 23 to the first axis scanner 21. 1) is detected, and the detected increase amount information is transmitted to the laser oscillation control unit 3 as the first-axis scanning speed information of the pulsed laser by the first-axis scanner 21.

  Further, as shown in FIG. 2C, the driver controller 25 increases the voltage (speed) increase amount (ΔV2 = Vn−) per minute time (predetermined time) applied from the second driver 24 to the second axis scanner 22. Vn-1) is detected, and the detected increase amount information is transmitted to the laser oscillation control unit 3 as second-axis scanning speed information of the pulsed laser by the second-axis scanner 22.

  In this embodiment, the scanner 2 includes a condenser lens 26 between the first axis scanner 21 and the second axis scanner 22 and the substrate 100 as shown in FIG. With this condensing lens 26, the pulsed laser beams coming from the first axis scanner 21 and the second axis scanner 22 can be condensed without being diffused and scanned while being irradiated onto the substrate 100. ing.

  As shown in FIG. 3, the laser oscillation control unit 3 includes a stop state transition determination unit 31, an acceleration state transition determination unit 32, a constant speed state transition determination unit 33, a deceleration state transition determination unit 34, and pulse frequency information. A generation unit 35, a reception unit 36, and a transmission unit 37 are provided.

  The acceleration state transition determination unit 32 determines whether or not the state is shifted from the stop state 20a to the acceleration state 20b. This determination is performed based on the scanning speed information received from the driver controller 25 and a preset first threshold value.

  In this embodiment, the combined scan speed information is generated by generating a combined speed increase vector from the respective speed increase amounts of the received first axis scan speed information and second axis scan speed information. The determination is performed based on the combined scanning speed information and the first threshold value.

  The constant velocity state transition determination unit 33 determines whether or not the acceleration state 20b has shifted to the constant velocity state 20c. This determination is made based on the combined scanning speed information and the second threshold value.

  The deceleration state transition determination unit 34 determines whether or not the state has shifted from the constant speed state 20c to the deceleration state 20d. This determination is made based on the combined scanning speed information and the third threshold value.

  The stop state transition determination unit 31 determines whether or not a transition is made from the deceleration state 20d to the stop state 20a. This determination is made based on the combined scanning speed information and the fourth threshold value.

  The pulse frequency information generation unit 35 determines that the acceleration state transition determination unit 32 has transitioned to the acceleration state 20b, and the deceleration state transition determination unit 34 determines that transition to the deceleration state 20d has occurred. If so, pulse frequency information about the pulse frequency is generated.

  In this embodiment, the speed increase amount is adopted as the scanning speed information, and the absolute value of the speed increase amount is adopted, and the same numerical values are set as the first threshold value to the fourth threshold value. (First threshold = second threshold = third threshold = fourth threshold).

  The receiving unit 36 receives, for example, the first axis scanning speed information and the second axis scanning speed information from the driver controller 25. The receiving unit 36 receives information on the pulse frequency and the amount of energy per time from the main controller 10, for example.

  The transmission unit 37 transmits, for example, pulse frequency information to the laser oscillator controller 11.

  Although not shown, the laser oscillation control unit 3 communicates with a memory serving as a recording device, a CPU serving as a control device, a display unit serving as a display device, a button key serving as an input device, a driver controller 25, and the main controller 10. A communication interface is provided.

  3 is a stop state transition determination unit 31, an acceleration state transition determination unit 32, a constant speed state transition determination unit 33, a deceleration state transition determination unit 34, a pulse frequency information generation unit 35, a reception unit 36, and a transmission unit. It functions as the unit 37.

  Next, the operation of the apparatus of this embodiment will be described. 4 to 6 are flowcharts showing the flow of processing when a circuit board is manufactured by the apparatus of the invention.

  First, when the driver controller 25 starts operation, a signal to that effect is transmitted to the laser oscillation control unit 3 (not shown). The received laser oscillation control unit 3 determines that it is in the stopped state 20a (FIG. 4, step S1). In this state, as shown in FIGS. 2A and 2C, the first-axis scanner 21 and the second-axis scanner 21 are in a state where a slight voltage is applied.

  When it is determined that the laser oscillation control unit 3 is in the stopped state, the laser oscillation control unit 3 transmits laser oscillation stop information indicating that the oscillation of the pulsed laser is stopped to the laser oscillator controller 11. The received laser oscillator controller 11 stops the pulsed laser oscillation from the laser oscillator 1 (step S2 in FIG. 4).

  Thereafter, the laser oscillation control unit 3 determines whether or not the speed increase amount of the scanning speed information received from the driver controller 25 is equal to or greater than the first threshold value in the stopped state (FIG. 4, step S3).

  If it is determined in step S3 that the threshold value is not equal to or greater than the first threshold value, the control is returned to wait for the threshold value to be equal to or greater than the first threshold value. On the other hand, if it is determined in step S3 that the first threshold value is exceeded, the laser oscillation control unit 3 determines that the acceleration state 20b has been entered (FIG. 4, step S4).

  When it is determined that the acceleration state 20b has been entered, the laser oscillation control unit 3 controls the laser oscillator 1 via the laser oscillator controller 11 so as to oscillate a pulsed laser at regular intervals. (FIG. 4, step S5). That is, the laser oscillator 1 is controlled so as to be substantially the same as the distance pitch and the amount of energy per time when scanning in the constant speed state 20c.

  More specifically, the laser oscillation control unit 3 calculates a scanning distance per predetermined time from the speed increase received from the driver controller 25 (FIG. 6, step S51).

  Then, based on the scanning distance per predetermined time, pulse frequency information about the pulse frequency is generated so as to be the same as the distance pitch in the constant speed state received from the main controller 10 (FIG. 6, step S52).

  In this acceleration state 20b, the speed gradually increases from the start of the acceleration state 20b until the constant speed state is entered. Therefore, when the pulse frequency is set to be the same as the distance pitch in the constant speed state, as shown in FIG. 2B, for example, the pulse frequency t1 at the start, that is, the time interval t1 for oscillating the pulse laser is equal. It becomes larger than the pulse frequency (time interval) t2 in the high speed state. Then, the pulse frequency gradually decreases as it approaches the constant speed state, and is almost the same as the pulse frequency t2 in the constant speed state immediately before entering the constant speed state.

  As shown in FIG. 6, the laser oscillation control unit 3 that has generated the pulse frequency information transmits the generated pulse frequency information to the laser oscillator controller 11 (FIG. 6, step S53). The received laser oscillator controller 11 oscillates a pulsed laser from the laser oscillator 1 based on the received pulse frequency information.

  Next, the laser oscillation control unit 3 determines whether or not the speed increase amount is smaller than the second threshold value in the acceleration state 20b (FIG. 4, step S6). If it is determined in step S6 that it is not smaller than the second threshold value, the laser oscillation control unit 3 returns control to step S5.

  On the other hand, if it is determined in step S6 that the value has become smaller than the second threshold value, the laser oscillation control unit 3 determines that the low-speed state 20c has been entered (FIG. 4, step S7).

  The laser oscillation control unit 3 controls to oscillate the pulsed laser at a constant pulse frequency, that is, at an equal time interval t2 as shown in FIG. 2B (FIG. 4, step S8).

  Specifically, in this embodiment, information on the pulse frequency in the constant velocity state received from the main controller 10 is transmitted to the laser oscillator controller 11. The laser oscillator controller 11 oscillates a pulsed laser from the laser oscillator 1 based on the received pulse frequency information.

  Next, the laser oscillation control unit 3 determines whether or not the speed increase amount is greater than the third threshold value in the constant speed state 20b (FIG. 5, step S9). If it is determined in step S9 that it is not smaller than the third threshold value, the laser oscillation control unit 3 returns control to step S8.

  On the other hand, if it is determined in step S9 that the value is larger than the third threshold value, the laser oscillation control unit 3 determines that the state has shifted to the deceleration state 20d (FIG. 5, step S10).

  Then, the laser oscillation control unit 3 controls the laser oscillator 1 via the laser oscillator controller 11 so as to oscillate a pulsed laser at every constant distance (FIG. 5, step S11). That is, the laser oscillator 1 is controlled so as to be substantially the same as the distance pitch and the amount of energy per time when scanning in the constant velocity state 20c.

  The operation of the laser oscillation control unit 3 in step S11 is substantially the same as in step 5 above. More specifically, the laser oscillation control unit 3 calculates the scanning distance per predetermined time from the speed increase amount.

  Then, based on the scanning distance per predetermined time, pulse frequency information about the pulse frequency is generated so as to be the same as the distance pitch in the constant speed state received from the main controller 10 and transmitted to the laser oscillator controller 11. To do.

  In the deceleration state 20d, the speed gradually decreases as the stop state is approached from the start. Therefore, when the pulse frequency is made the same as the distance pitch in the constant speed state, for example, as shown in FIG. 2B, the pulse frequency at the start of the deceleration state 20d is almost the same as the pulse frequency t2 in the constant speed state. Become. The pulse frequency gradually increases as it approaches the stop state, and the pulse frequency t3 becomes the maximum immediately before entering the stop state.

  Next, the laser oscillation control unit 3 determines whether or not the speed increase amount is smaller than the fourth threshold value in the deceleration state 20d (FIG. 5, step S12). If it is determined in step S12 that the value is not smaller than the fourth threshold value, the laser oscillation control unit 3 returns control to step S11.

  On the other hand, if it is determined in step S12 that the value is smaller than the fourth threshold value, the laser oscillation control unit 3 returns control to step S1.

  By configuring as described above, for example, even when scanning is performed while changing the scanning direction of the pulsed laser, scanning can be performed with the same distance pitch as in the constant speed state and with substantially the same energy amount per time.

  For example, as shown in FIG. 7B, the pulsed laser is scanned from the rear side to the front position on the surface of the substrate, and further scanned from the position to the left side by changing the scanning direction by approximately 90 °. When scanning in this way, as shown in FIG. 7A, the scanning speed proceeds from the rear side to the front in a constant speed state 20c, and gradually increases from the front position to the front position. The deceleration state 20d is delayed.

  Then, the vehicle is temporarily stopped 20a at the front position, and is accelerated to the left 20b from the front position to the acceleration state 20b. The constant speed state 20c is reached at a position advanced by a predetermined distance.

  At that time, from the rear side to the left side, as shown in FIG. 8B, for example, the pulse frequency t4 in the constant speed state 20c, the pulse frequency t5 in the deceleration state 20d, and the pulse frequency t6 in the acceleration state 20b When is set the same, it becomes as follows.

  In this case, as shown in FIG. 8A, in the constant velocity state 20c from the rear side to the front side, the distance pitch L3 of the pulsed laser is constant, but from the front position to the front position. The distance pitch L4 in the deceleration state 20d gradually decreases. Further, the distance pitch in the acceleration state 20b from the front position to the left side gradually increases from the narrowed state.

  Therefore, in the vicinity where the scanning direction changes, the distance pitch is not the same as in the constant speed state, and the energy density per unit area of the laser cannot be made uniform.

  However, in the above embodiment, as shown in FIG. 7 (b), the distance pitch L1 of the pulsed laser in the constant velocity state 20c from the rear side to the front side, and the deceleration state from the front position of the front position to the front position thereof. The distance pitch L2 at 20d is the same. The distance pitch in the acceleration state 20b from the front position to the left side is also the same. Accordingly, scanning can be performed with the same distance pitch as in the constant speed state and with substantially the same energy amount per time.

  In the above embodiment, the absolute value of the speed increase amount is used as the scanning speed information in each state. However, the present invention is not limited to this. For example, a negative increase amount may be used without using the absolute value. . In that case, for example, the same value can be used for the first threshold value and the second threshold value, and the same value can be used for the third threshold value and the fourth threshold value.

  Further, the scanning speed information is not limited to the form using the speed increase amount, and the scanning speed (voltage) value may be used as the scanning speed information as it is. In that case, the first threshold value to the fourth threshold value may be set to different numerical values.

  In the above embodiment, the scanning speed information is the combined scanning speed information generated from the first axis scanning speed information and the second axis scanning speed information. .

  For example, the scanning speed information in the acceleration state and the deceleration state may be the one with the larger value indicated by comparing the scanning speed information for the first axis and the scanning speed information for the second axis. For example, the speed increase amount ΔV1 in the acceleration state shown in FIG. 2A is compared with the speed increase amount ΔV2 in the acceleration state shown in FIG. When the speed increase amount ΔV1 that is the first-axis scanning speed information is larger than the speed increase amount ΔV2 that is the second-axis scanning speed information, the larger first-axis scanning speed information is used as the scanning speed information. To do.

  Alternatively, the scanning speed information in the acceleration state and the deceleration state may be one of the first axis scanning speed information and the second axis scanning speed information.

  In the above embodiment, the laser scanning control unit 3 receives information on the pulse frequency in the constant speed state from the main controller 10. For example, the laser scanning control unit 3 stores the information in advance in a database included in the laser scanning control unit 3. May be. Alternatively, the computer can be accessed by the laser scanning control unit 3, stored in advance in a database of a computer different from this apparatus, and transmitted from the other computer to the laser scanning control unit 3. It can be changed as appropriate.

It is a schematic explanatory drawing of the manufacturing apparatus of the circuit board of one Embodiment of this invention. FIG. 2A is a graph showing the relationship between voltage (speed) applied to the first axis scanner and time, and FIG. 2B is a graph showing the relationship between pulsed laser oscillation and time, FIG. 2C is a graph showing the relationship between the voltage (speed) applied to the second axis scanner and time. It is a block diagram for demonstrating a laser oscillation control part. It is a part of flowchart which shows the flow of a process in the case of manufacturing a circuit board with the apparatus of this invention. It is another one part of the flowchart which shows the flow of a process in the case of manufacturing a circuit board with the apparatus of this invention. It is a flowchart which shows the detail of the flow of a process in the case of controlling to oscillate a pulsed laser for every fixed distance. FIG. 7A is a graph showing the relationship between the scanning speed and time when the pulsed laser is scanned while changing the scanning direction, and FIG. 7B is a graph showing the relationship between the scanning speed and the scanning direction of the pulsed laser. FIG. 6 is a schematic diagram when scanning is performed. 8A is a graph showing the relationship between the scanning speed and time when the pulsed laser is scanned while changing the scanning direction in the comparative example, and FIG. In a comparative example, it is a schematic diagram at the time of making a pulsed laser scan, changing a scanning direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laser oscillator 2 Scanner 3 Laser oscillation control part 21 1st axis | shaft scanner 22 2nd axis | shaft scanner

Claims (10)

A circuit board manufacturing apparatus for manufacturing a circuit board by scanning a pulsed laser on the surface of the substrate on which the metal thin film is formed, removing unnecessary portions in the metal thin film and forming a circuit on the substrate,
Laser oscillator that oscillates the pulsed laser, scanner that receives the pulsed laser from the laser oscillator and scans the surface of the substrate with the pulsed laser, and a laser scanning control unit that can communicate with the scanner and the laser oscillator And
In the scanning, the scanner accelerates the pulsed laser while accelerating from the stopped state, scans the pulsed laser at a constant speed from the accelerated state, and decelerates the pulsed laser from the constant speed state. The scanning is performed while sequentially shifting to the four states of the deceleration state in which scanning is performed and the pulsed laser is stopped from the deceleration state to stop scanning,
The laser scanning control unit shifts the scanner from one of the four states to the next state based on scanning speed information regarding the scanning speed in each of the four states and a preset threshold value. If it is determined whether or not it has shifted to the acceleration state or the deceleration state, the pulse frequency is set to be approximately the same as the distance pitch and the amount of energy per time when scanning in the constant speed state. An apparatus for manufacturing a circuit board, wherein information is generated and transmitted to a laser oscillator. The scanner includes a first-axis scanner and a second-axis scanner for scanning in the directions of two axes orthogonal to each other when the surface of the substrate is scanned with a pulsed laser,
The first axis scanner and the second axis scanner scan the pulsed laser in each axial direction while sequentially shifting to the four states,
The scanning speed information in the acceleration state and the deceleration state is obtained by combining the first axis scanning speed information related to the scanning speed of the first axis scanner and the second axis scanning speed information related to the scanning speed of the second axis scanner. 2. The circuit board manufacturing apparatus according to claim 1, wherein the combined scanning speed information is used. The scanner includes a first-axis scanner and a second-axis scanner for scanning in the directions of two axes orthogonal to each other when the surface of the substrate is scanned with a pulsed laser,
The first axis scanner and the second axis scanner scan the pulsed laser in each axial direction while sequentially shifting to the four states,
The scanning speed information in the acceleration state and the deceleration state is the first axis scanning speed information related to the scanning speed of the first axis scanner and the second axis scanning speed information related to the scanning speed of the second axis scanner. 2. The apparatus for manufacturing a circuit board according to claim 1, wherein each of the values has a larger value. The scanner includes a first-axis scanner and a second-axis scanner for scanning in the directions of two axes orthogonal to each other when the surface of the substrate is scanned with a pulsed laser,
The first axis scanner and the second axis scanner scan the pulsed laser in each axial direction while sequentially shifting to the four states,
The scanning speed information in the acceleration state and the deceleration state is either the first axis scanning speed information related to the scanning speed of the first axis scanner or the second axis scanning speed information related to the scanning speed of the second axis scanner. 2. The circuit board manufacturing apparatus according to claim 1, wherein the circuit board manufacturing apparatus is one.   The threshold value is a first threshold value used when determining whether or not the vehicle has shifted from the stopped state to the accelerated state, and a second threshold value used when determining whether or not the vehicle has shifted from the accelerated state to the constant speed state. And a third threshold value used when determining whether or not the vehicle has shifted from the constant speed state to the deceleration state, and a fourth threshold value used when determining whether or not the vehicle has shifted from the deceleration state to the stopped state. The circuit board manufacturing apparatus according to claim 1, wherein the circuit board manufacturing apparatus is a circuit board.   The circuit board manufacturing apparatus according to claim 1, wherein the scanning speed information is a change amount of a speed per predetermined time.   The circuit board manufacturing apparatus according to claim 6, wherein the scanning speed information is an absolute value of the change amount. The scanning speed information is a change amount of speed per predetermined time,
When it is determined that the laser scanning control unit has shifted to the acceleration state or the deceleration state, the laser scanning control unit calculates a scanning distance per predetermined time based on the scanning speed information,
The circuit board manufacturing apparatus according to claim 1, wherein the pulse frequency information is generated based on a scanning distance. The laser scanning control unit is determined to be able to access a database storing a distance pitch for oscillating a pulsed laser in a constant speed state and an energy amount per time, and has shifted to a constant speed state. In this case, the distance pitch for oscillating the pulsed laser and the energy amount per time are obtained from the database and transmitted to the laser oscillator,
The circuit according to any one of claims 1 to 8, wherein the pulse frequency information is generated based on a distance pitch and an energy amount per time in a constant speed state obtained from the database. Board manufacturing equipment. A laser oscillator that oscillates the pulsed laser, and a scanner that scans the surface of the substrate while sequentially shifting the pulsed laser from the laser oscillator into four states of an acceleration state, a constant speed state, a deceleration state, and a stop state And a circuit board manufacturing apparatus provided with a laser scanning control unit capable of communicating with the scanner and the laser oscillator, the surface of the substrate on which the metal thin film is formed is scanned with a pulsed laser, and the metal thin film is unnecessary. A circuit board manufacturing method for manufacturing a circuit board by removing a portion and forming a circuit on the board,
Based on the scanning speed information regarding the scanning speed in each of the four states and a preset threshold value, the scanner has shifted from one of the four states to the next state. If it is determined whether or not it has shifted to the acceleration state or the deceleration state, the pulse frequency is set to be approximately the same as the distance pitch and the amount of energy per time when scanning in the constant speed state. A method of manufacturing a circuit board, characterized by causing information to be generated and transmitted to a laser oscillator.

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