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CN-121981063-A - Gold thread rapid wiring and adjusting method based on CAD drawing wiring

CN121981063ACN 121981063 ACN121981063 ACN 121981063ACN-121981063-A

Abstract

The invention discloses a rapid gold wire wiring and adjusting method based on CAD drawing wiring, which is characterized by comprising the following steps: the invention can automatically analyze CAD drawings without manually drawing gold wires point by point, and all patterns can realize unified adjustment through the reference frame, support integral scaling, unified rotation and integral translation, and the number of the gold wires does not influence adjustment speed, thereby being suitable for large-scale pin encapsulation.

Inventors

  • LI GUANGTAO

Assignees

  • 上海铭沣科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260306

Claims (7)

  1. 1. A gold thread rapid wiring and adjusting method based on CAD drawing wiring is characterized by comprising the following steps: S1, abstracting each structure in a CAD drawing to be a basic geometric element, and converting all geometric shapes into uniform two-dimensional coordinate representation; s2, referring to a global coordinate model of a frame body, the system selects a rectangular frame from a drawing as a main frame body, and sets the geometric center of the rectangular frame as an origin of a global reference coordinate system; S3, unifying affine transformation models, and unifying two-dimensional affine transformation matrixes; s4, automatic positioning of gold thread welding points, wherein the gold thread is generally formed by two welding points, which are respectively called starting points And endpoint ; S5, generating a model of a gold wire path, wherein a straight line segment is expressed as connection between two points: The coordinates are: Wherein: when generating an arc or lifting line type, introducing a quadratic or cubic Bezier curve model: Wherein the method comprises the steps of Automatically generating a control point through an offset rule; s6, batch adjustment of gold thread paths, and applying affine transformation matrix to the reference frame Then, using: And the new space positions of all gold wires can be obtained, so that quick batch updating is realized.
  2. 2. The rapid wiring and adjustment method for gold wires based on CAD drawing wiring according to claim 1, wherein the basic geometric elements include: Rectangle is defined by the coordinates of the center point Angle of direction Length of long side Length of short side A representation; line segment from end point 、 A representation; circular mark, which is formed by circle center Radius sum A representation; Gold wire bond pad is represented by pad center or dot center.
  3. 3. The rapid wiring and adjusting method for gold wires based on CAD drawing wiring as claimed in claim 1, wherein the origin of the coordinate system is expressed as: The coordinates of all the graphic elements are represented by an offset vector with respect to the reference point: When the reference frame is transformed, all the graphic objects are computationally updated through the same affine transformation matrix.
  4. 4. The rapid wiring and adjustment method for gold wires based on CAD drawing wiring according to claim 1, wherein the two-dimensional affine transformation matrix is expressed as: Involving scaling Angle of rotation Translation of 。
  5. 5. The rapid wiring and adjusting method for gold wires based on CAD drawing wiring as in claim 4, wherein any graphic point The new coordinates of (2) are given by the following formula: the coordinates of all other graphics can be updated synchronously by only changing the reference frame once no matter how many graphics are.
  6. 6. The rapid gold wire wiring and adjusting method based on CAD drawing wiring according to claim 1, wherein in the step S4, for a rectangular bonding pad, gold wire starting points are calculated through rectangular center points, and for a graph containing circular point marks, welding points are directly determined through circle center coordinates.
  7. 7. The rapid wiring and adjusting method for gold wires based on CAD drawing wiring as in claim 1, wherein for irregular bonding pads, by calculating the circumscribed rectangle or center point, a geometric gravity center formula is adopted: thereby precisely acquiring the welding point position.

Description

Gold thread rapid wiring and adjusting method based on CAD drawing wiring Technical Field The invention relates to the technical field of machine vision and semiconductors, in particular to a rapid gold wire wiring and adjusting method based on CAD drawing wiring. Background Gold wire interconnection is one of core processes of chip packaging, and a micron-level high-purity gold wire is used for connecting a chip with an external pin, so that signal transmission is realized. The gold wire and the bonding pad are firmly combined in an atomic layer by mainly relying on heat, ultrasonic waves and pressure. By virtue of excellent conductivity, extremely strong oxidation resistance and extremely high process reliability of gold, the technology is widely applied to high-end fields with severe stability requirements, such as aerospace, medical appliances and the like. In the gold wire interconnection process, gold wire connection paths need to be planned according to the positions of bonding pads on a package substrate or a chip lead frame. The traditional method relies on manual drawing of gold wires one by one in CAD drawing or equipment software interface, involves a large number of repeated, inefficient and error-prone operations, and affects the connection efficiency of gold wires. Disclosure of Invention According to the embodiment of the invention, a rapid gold wire wiring and adjusting method based on CAD drawing wiring is provided, which is characterized by comprising the following steps: S1, abstracting each structure in a CAD drawing to be a basic geometric element, and converting all geometric shapes into uniform two-dimensional coordinate representation; s2, referring to a global coordinate model of a frame body, the system selects a rectangular frame from a drawing as a main frame body, and sets the geometric center of the rectangular frame as an origin of a global reference coordinate system; S3, unifying affine transformation models, and unifying two-dimensional affine transformation matrixes; s4, automatic positioning of gold thread welding points, wherein the gold thread is generally formed by two welding points, which are respectively called starting points And endpoint; S5, generating a model of a gold wire path, wherein a straight line segment is expressed as connection between two points: The coordinates are: Wherein: when generating an arc or lifting line type, introducing a quadratic or cubic Bezier curve model: Wherein the method comprises the steps of Automatically generating a control point through an offset rule; s6, batch adjustment of gold thread paths, and applying affine transformation matrix to the reference frame Then, using: And the new space positions of all gold wires can be obtained, so that quick batch updating is realized. Further, the basic geometric elements include: Rectangle is defined by the coordinates of the center point Angle of directionLength of long sideLength of short sideA representation; line segment from end point 、A representation; circular mark, which is formed by circle center Radius sumA representation; Gold wire bond pad is represented by pad center or dot center. Further, the origin of the coordinate system is expressed as: The coordinates of all the graphic elements are represented by an offset vector with respect to the reference point: When the reference frame is transformed, all the graphic objects are computationally updated through the same affine transformation matrix. Further, the two-dimensional affine transformation matrix is expressed as: Involving scaling Angle of rotationTranslation of。 Further, arbitrary graphic dotsThe new coordinates of (2) are given by the following formula: the coordinates of all other graphics can be updated synchronously by only changing the reference frame once no matter how many graphics are. Further, in the step S4, for the rectangular bonding pad, a gold wire starting point is calculated through a rectangular center point, and for the graph including the circular point mark, the bonding point is directly determined through the center coordinates. Further, for the irregular bonding pad, a geometric gravity center formula is adopted by calculating an external rectangle or a central point of the irregular bonding pad: thereby precisely acquiring the welding point position. According to the rapid gold wire wiring and adjusting method based on CAD drawing wiring, CAD drawing can be automatically analyzed, no manual point-by-point drawing of gold wires is needed, all patterns can be uniformly adjusted through a reference frame, overall scaling, uniform rotation and overall translation are supported, the number of the gold wires does not influence adjustment speed, the rapid gold wire wiring and adjusting method is suitable for large-scale pin packaging, multiple structures such as rectangular bonding pads, wire bonding pads and circular bonding pads are supported, and compared with manual drawing, wiring time can be sho