Title:
制御装置、加工システムおよび制御方法
Document Type and Number:
Japanese Patent JP6972560
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for accurately processing a via stab in such a manner that impedance of a via which is formed on a multilayer wiring board becomes an appropriate value.SOLUTION: A control device comprises: a step waveform generation circuit which generates a step waveform; a sampling circuit which samples a reflection waveform of the step waveform; a counter which outputs a preset voltage value corresponding to a desired impedance value; a comparator which shifts an output value in accordance with a comparison result of comparing a voltage value of the reflection waveform with the preset voltage value; a timer which shifts an output value in the timing when a reflection component from a via appears in the reflection waveform, and the timing of falling of the step waveform; a flip-flop which shifts an output value in accordance with the output value of the comparator synchronously with a sampling clock and shifts the output value in the timing when the output value of the timer is shifted; and a drill control circuit which controls a drill in accordance with the shift of the output value of the flip-flop.SELECTED DRAWING: Figure 3
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Inventors:
Ryohisa Matsuoka
Application Number:
JP2017005184A
Publication Date:
November 24, 2021
Filing Date:
January 16, 2017
Export Citation:
Assignee:
NEC
International Classes:
H05K3/46; B23B41/00; B23B49/00; B23Q17/00; B23Q17/20; B26F1/16; H05K3/00
Domestic Patent References:
| JP2007509487A | ||||
| JP2005116945A | ||||
| JP2008218925A | ||||
| JP2014187153A | ||||
| JP2015007552A | ||||
| JP2016128750A | ||||
| JP2009287943A |
Foreign References:
| US20150338457 |
Attorney, Agent or Firm:
Masahiko Desk
Naoki Shimosaka
Naoki Shimosaka