Mounting method for magnetic components

Abstract

This application discloses a method for mounting magnetic components, relating to the field of semiconductor mounting. The method includes the following steps: Step 1, applying weak magnetism to the nozzle; Step 2, ensuring that the magnetic attraction force generated by the nozzle satisfies: the nozzle magnetic attraction force ≤ the weight of the magnetic component; simultaneously, ensuring that the resultant force of the magnetic attraction force generated by the nozzle and the vacuum adsorption force satisfies: nozzle magnetic attraction force + vacuum adsorption force ≥ the magnetic attraction force of external iron on the magnetic component + the weight of the magnetic component. This application provides a method for adjusting the magnitude of the nozzle's magnetic attraction force, enabling the nozzle's magnetic attraction force to counteract the magnetic attraction force of external iron on the magnetic component, while preventing the magnetic component from being prematurely attracted and displaced before the nozzle contacts it. Furthermore, it enhances the nozzle's control over the chip to ensure stable pick-up of the magnetic component during transfer.

Description

Technical Field

[0001] This application relates to the field of semiconductor mounting, and more particularly to a mounting method for magnetic components. Background Technology

[0002] In existing technologies, suction nozzles mount magnetic components using vacuum adsorption. However, because magnetic components are magnetic, external ferrite will exert a magnetic attraction on them, causing the position of the magnetic component to be picked up to shift. When the vacuum adsorption force is less than the external magnetic attraction, the suction nozzle has difficulty stably picking up the magnetic component.

[0003] Using a magnetic nozzle can counteract the magnetic interference of magnetic components, thus facilitating their pickup. However, if the magnetic force applied to the nozzle is too great, it will attract the magnetic component before the nozzle reaches it, causing the component to shift and resulting in inaccurate pickup. Conversely, if the magnetic force is too small, the nozzle will not hold the magnetic component firmly. Summary of the Invention

[0004] The purpose of this application is to achieve a dynamic balance between the magnetic adsorption force of the nozzle and the magnetic interference force of the magnetic components, so as to avoid premature adsorption before contact while ensuring stable retention after pickup.

[0005] To address the aforementioned technical problems, this application provides a method for mounting magnetic components, comprising the following steps:

[0006] Step 1: Apply a weak magnetism to the nozzle;

[0007] Step 2: Ensure that the magnetic attraction force generated by the nozzle satisfies the following conditions: magnetic attraction force of the nozzle ≤ gravity of the magnetic component; at the same time, ensure that the resultant force of the magnetic attraction force generated by the nozzle and the vacuum adsorption force satisfies the following condition: magnetic attraction force of the nozzle + vacuum adsorption force ≥ magnetic attraction force of the external iron on the magnetic component + gravity of the magnetic component.

[0008] Preferably, step 2 includes:

[0009] S101: Select any unselected nozzle, turn off the vacuum adsorption function of the nozzle, and gradually bring the nozzle closer to the magnetic component. During the process of the nozzle moving to the target position, observe whether the position of the magnetic component shifts. If yes, repeat step S101; if no, proceed to step S102.

[0010] S102: Activate the vacuum adsorption function of the nozzle to pick up and transfer the magnetic component. Observe whether the nozzle stably picks up the magnetic component during its movement. If yes, use the current nozzle to pick up subsequent magnetic components. If not, repeat S101.

[0011] Preferably, when the magnetic attraction force of the suction nozzle is known, step 2 includes:

[0012] S201: Turn off the vacuum adsorption function of the nozzle, and gradually bring the nozzle closer to the magnetic component. During the process of the nozzle moving to the target position, observe whether the position of the magnetic component has shifted. If yes, proceed to step S202; if no, proceed to step S203.

[0013] S202: Repeat S201 after replacing the nozzle with one that has a weaker magnetic attraction force;

[0014] S203: Activate the vacuum adsorption function of the nozzle to pick up and transfer the magnetic component. Observe whether the nozzle stably picks up the magnetic component during its movement. If yes, use the current nozzle to pick up subsequent magnetic components. If no, determine whether step S202 has been executed. If step S202 has not been executed, replace the nozzle with one that has a stronger magnetic force and repeat S201. If step S202 has been executed, determine that there is currently no suitable nozzle.

[0015] Preferably, the mounting method for magnetic components further includes:

[0016] Step 3: Place the carrier on the loading platform, and the loading platform will move the carrier to the loading position;

[0017] Step 4: The suction nozzle picks up the magnetic components on the carrier and moves them to the target position.

[0018] Preferably, the target position is the chip receiving position of the rotating mechanism, which can fix the magnetic component and drive the magnetic component to rotate.

[0019] Preferably, the rotating mechanism fixes the magnetic components by vacuum adsorption.

[0020] Preferably, the mounting method for magnetic components further includes:

[0021] Step 5: The rotating mechanism drives the magnetic component to rotate so that the mounting surface of the magnetic component faces downward.

[0022] Preferably, the mounting method for magnetic components further includes:

[0023] Step 6: Perform the mounting operation on the rotated magnetic components and determine whether the mounted component is the last magnetic component on the carrier; if not, repeat steps 3-6; if yes, stop the operation.

[0024] Preferably, step 1 includes:

[0025] The nozzle body is made of austenitic stainless steel, and a magnetically adjustable area is formed at the end of the nozzle through cold deformation processing.

[0026] Preferably, the strength of the magnetic properties of the austenitic stainless steel suction nozzle is controlled by synergistically regulating the combination of process parameters such as the geometric dimensions, cold working feed rate, and cutting speed.

[0027] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0028] This invention provides a method for adjusting the magnetic attraction force of the suction nozzle, enabling the suction nozzle to counteract the magnetic attraction force of external iron on magnetic components, while preventing the magnetic components from being prematurely attracted and shifted before the suction nozzle even contacts them. In addition, it can enhance the suction nozzle's control over the chip to ensure that the suction nozzle can stably pick up the magnetic components during the transfer process. Attached Figure Description

[0029] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a flowchart of the mounting method for magnetic components provided in the embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the suction nozzle provided in the embodiments of this application. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] Please refer to the following: Figure 1 The mounting method for magnetic components includes the following steps:

[0034] Step 1: Apply a weak magnet to the nozzle. Please refer to the following instructions. Figure 2 , Figure 2 This is a schematic diagram of the suction nozzle. The nozzle body is made of austenitic stainless steel. A magnetically adjustable area is formed at the end of the nozzle through cold deformation processing. Furthermore, the strength of the suction nozzle's magnetism can be controlled by synergistically adjusting the process parameters of the austenitic stainless steel nozzle's geometric dimensions, cold working feed rate, and cutting speed.

[0035] Magnetic components generally refer to electronic components that rely on magnetic materials or magnetic field properties to achieve their functions, such as isolators, inductors, transformers, magnetic beads, and magnetic sensors. Weak magnetism means that the magnetic force of the suction nozzle can counteract the magnetic attraction of external iron to the magnetic components, while the magnetic force generated by the nozzle will not cause the magnetic components to shift due to excessive magnetism. Austenitic stainless steel, such as 304 stainless steel, is non-magnetic, but cold deformation processing, such as stamping and stretching, will induce a partial transformation of austenite to martensite, thus generating magnetism. The size of the suction nozzle end directly affects the stress distribution during cold deformation processing, and thus affects the martensite transformation ratio. High feed rate combined with low cutting speed can increase the plastic deformation depth, prolong the strain aging time of the processing zone, and promote the martensitic phase transformation. Low feed rate combined with high cutting speed can weaken the work hardening effect and reduce the martensite transformation rate, but can reduce surface burrs.

[0036] Step 2: Ensure that the magnetic attraction force generated by the nozzle satisfies the following conditions: magnetic attraction force of the nozzle ≤ gravity of the magnetic component; at the same time, ensure that the resultant force of the magnetic attraction force generated by the nozzle and the vacuum adsorption force satisfies the following condition: magnetic attraction force of the nozzle + vacuum adsorption force ≥ magnetic attraction force of the external iron on the magnetic component + gravity of the magnetic component.

[0037] Step 2 includes the following specific steps:

[0038] S101: Select any unselected nozzle, turn off the vacuum adsorption function of the nozzle, and gradually bring the nozzle closer to the magnetic component. During the process of the nozzle moving to the target position, observe whether the position of the magnetic component shifts. If yes, repeat step S101; if no, proceed to step S102.

[0039] S102: Activate the vacuum adsorption function of the nozzle to pick up and transfer the magnetic component. Observe whether the nozzle stably picks up the magnetic component during the movement of the magnetic component. If yes, use the current nozzle to pick up the subsequent magnetic components. If no, repeat S101.

[0040] The target position is the end point of the material picking route of the suction nozzle. That is, each material picking route corresponds to a magnetic component. The magnetic component is usually set on the rotating loading platform by a carrier. Stable suction means that the magnetic component will not fall or shift during the process of the suction nozzle picking up and transferring the magnetic component.

[0041] When the magnetic attraction force of the suction nozzle is known, step 2 can be replaced with:

[0042] S201: Turn off the vacuum adsorption function of the nozzle, and gradually bring the nozzle closer to the magnetic component. During the process of the nozzle moving to the target position, observe whether the position of the magnetic component has shifted. If yes, proceed to step S202; if no, proceed to step S203.

[0043] S202: Repeat S201 after replacing the nozzle with one that has a weaker magnetic attraction force;

[0044] S203: Activate the vacuum adsorption function of the nozzle to pick up and transfer the magnetic component. Observe whether the nozzle stably picks up the magnetic component during its movement. If yes, use the current nozzle to pick up subsequent magnetic components. If no, determine whether step S202 has been executed. If step S202 has not been executed, replace the nozzle with one that has a stronger magnetic force and repeat S201. If step S202 has been executed, determine that there is currently no suitable nozzle.

[0045] When the magnetic attraction force of the suction nozzle is known, steps S201-S203 can be used as alternatives to steps S101 and S102. When the initially selected suction nozzle is the one with the strongest attraction force, if the magnetic components cannot be stably attracted during step S203, it is directly determined that there is no suction nozzle that meets the requirements.

[0046] Step 3: Place the carrier on the loading platform, and the loading platform will move the carrier to the loading position;

[0047] The loading position refers to the suitable position for the suction nozzle to pick up material after the carrier moves with the loading platform. The suction nozzle is driven by the displacement mechanism to move. The displacement mechanism has a limited range of movement. Therefore, when the carrier is in the loading position, it must be ensured that the carrier is completely within the range of movement of the displacement mechanism so that the suction nozzle can pick up material from the carrier.

[0048] Step 4: The suction nozzle picks up the magnetic components on the carrier and moves them to the target position;

[0049] The target position is the chip receiving position of the rotating mechanism, which can fix the magnetic component and drive the magnetic component to rotate; the rotating mechanism fixes the magnetic component by vacuum adsorption.

[0050] Step 5: The rotating mechanism drives the magnetic component to rotate, so that the mounting surface of the magnetic component faces downward;

[0051] Step 6: Perform a mounting operation on the rotated magnetic components and determine whether the mounted magnetic component is the last magnetic component on the carrier. If not, repeat steps 3-6. If yes, stop the operation. Stopping the operation means that all magnetic components on the current carrier have been removed and the material removal from the current carrier has stopped, but does not mean that all subsequent operations have stopped.

[0052] In summary, this application provides a method for mounting magnetic components, achieving a dynamic balance between the magnetic adsorption force of the nozzle and the magnetic interference force of the magnetic components, thus avoiding premature adsorption before contact while ensuring stable retention after pickup.

[0053] It should also be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A method for mounting magnetic components, characterized in that, The process of mounting magnetic components using a weak magnetic nozzle includes the following steps: Step 1: Apply a weak magnetism to the nozzle; Step 2: Ensure that the magnetic attraction force generated by the nozzle satisfies the following conditions: magnetic attraction force of the nozzle ≤ gravity of the magnetic component; at the same time, ensure that the resultant force of the magnetic attraction force generated by the nozzle and the vacuum adsorption force satisfies the following condition: magnetic attraction force of the nozzle + vacuum adsorption force ≥ magnetic attraction force of the external iron on the magnetic component + gravity of the magnetic component. Step 2 includes: S101: Select any unselected nozzle, turn off the vacuum adsorption function of the nozzle, and gradually bring the nozzle closer to the magnetic component. During the process of the nozzle moving to the target position, observe whether the position of the magnetic component shifts. If yes, repeat step S101; if no, proceed to step S102. S102: Activate the vacuum adsorption function of the nozzle to pick up and transfer the magnetic component. Observe whether the nozzle stably picks up the magnetic component during the movement of the magnetic component. If yes, use the current nozzle to pick up the subsequent magnetic components. If no, repeat S101. If the magnetic attraction force of the suction nozzle is known, then step 2 includes: S201: Turn off the vacuum adsorption function of the nozzle, and gradually bring the nozzle closer to the magnetic component. During the process of the nozzle moving to the target position, observe whether the position of the magnetic component has shifted. If yes, proceed to step S202; if no, proceed to step S203. S202: Repeat S201 after replacing the nozzle with one that has a weaker magnetic attraction force; S203: Activate the vacuum adsorption function of the nozzle to pick up and transfer the magnetic component. Observe whether the nozzle stably picks up the magnetic component during its movement. If yes, use the current nozzle to pick up subsequent magnetic components. If no, determine whether step S202 has been executed. If step S202 has not been executed, replace the nozzle with one that has a stronger magnetic force and repeat S201. If step S202 has been executed, determine that there is currently no suitable nozzle.

2. The mounting method for magnetic components according to claim 1, characterized in that, Also includes: Step 3: Place the carrier on the loading platform, and the loading platform will move the carrier to the loading position; Step 4: The suction nozzle picks up the magnetic components on the carrier and moves them to the target position.

3. The mounting method for magnetic components according to claim 2, characterized in that, The target position is the chip receiving position of the rotating mechanism, which can fix the magnetic component and drive the magnetic component to rotate.

4. The mounting method for magnetic components according to claim 3, characterized in that, The rotating mechanism fixes the magnetic components by vacuum adsorption.

5. The mounting method for magnetic components according to claim 3 or 4, characterized in that, Also includes: Step 5: The rotating mechanism drives the magnetic component to rotate so that the mounting surface of the magnetic component faces downward.

6. The mounting method for magnetic components according to claim 5, characterized in that, Also includes: Step 6: Perform the mounting operation on the rotated magnetic components and determine whether the mounted component is the last magnetic component on the carrier; if not, repeat steps 3-6; if yes, stop the operation.

7. The mounting method for magnetic components according to claim 1, characterized in that, Step 1 includes: The nozzle body is made of austenitic stainless steel, and a magnetically adjustable area is formed at the end of the nozzle through cold deformation processing.

8. The mounting method for magnetic components according to claim 7, characterized in that, The strength of the nozzle's magnetism is controlled by coordinating and controlling the combination of process parameters such as the nozzle's geometry, cold working feed rate, and cutting speed.

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