公开(公告)号：US10162927B2

公开(公告)日：2018-12-25

申请号：US15915172

申请日：2018-03-08

Applicant: MEDIATEK INC.

Inventor： Shih-Ying Liu ,  Chin-Hsiung Hsu ,  Chi-Yuan Liu ,  Chun-Chih Yang ,  Chao-Neng Huang

IPC: G06F17/50

Abstract: A method for redistributing cell densities in layout of IC is provided. Initial cell density distribution and routing density distribution are obtained in an initial placement of the IC. White space is inserted into the initial placement according to a specific density value, so as to flatten the initial cell density distribution to the specific density value and obtain a flat cell density distribution. The specific density value is larger than a maximum cell density value within the initial cell density distribution. Cell densities of a first region are increased in the IC according to the routing density distribution and the flat cell density distribution, so as to obtain a modified cell density distribution. The modified cell density distribution is smoothed to obtain a calibrated cell density distribution. The white space is removed from the calibrated cell density distribution to obtain a final placement.

公开(公告)号：US09946829B2

公开(公告)日：2018-04-17

申请号：US14932165

申请日：2015-11-04

Applicant: MediaTek Inc.

Inventor： Shih-Ying Liu ,  Chin-Hsiung Hsu ,  Chi-Yuan Liu ,  Chun-Chih Yang ,  Chao-Neng Huang

IPC: G06F17/50

CPC classification number: G06F17/5072 ,  G06F17/5077

Abstract: A method for redistributing cell densities in layout of IC is provided. Initial cell density distribution and routing density distribution are obtained in an initial placement of the IC. White space is inserted into the initial placement according to a specific density value, so as to flatten the initial cell density distribution to the specific density value and obtain a flat cell density distribution. The specific density value is larger than a maximum cell density value within the initial cell density distribution. Cell densities of a first region are increased in the IC according to the routing density distribution and the flat cell density distribution, so as to obtain a modified cell density distribution. The modified cell density distribution is smoothed to obtain a calibrated cell density distribution. The white space is removed from the calibrated cell density distribution to obtain a final placement.

公开(公告)号：US09892226B2

公开(公告)日：2018-02-13

申请号：US15147152

申请日：2016-05-05

Applicant: MediaTek Inc.

Inventor： Chin-Hsiung Hsu ,  Chun-Chih Yang ,  Shih-Ying Liu ,  Che-Jung Lou ,  Chao-Neng Huang ,  Chi-Yuan Liu

IPC: G06F17/50

CPC classification number: G06F17/5072 ,  G06F2217/12 ,  Y02P90/265

Abstract: A method for providing a macro placement of an integrated circuit is provided. An initial placement of the integrated circuit is obtained, wherein the initial placement includes a plurality of first macro blocks. The first macro blocks are divided into a plurality of groups according to the hierarchy of the integrated circuit. A value of layout area is obtained for each of the groups according to macro areas of the first macro blocks. A plurality of candidate placements are obtained for each of the groups according to the value of placement area corresponding to the group, wherein the candidate placement includes the first macro blocks corresponding to the group. A first macro placement is obtained according to a specific placement o selecting from the candidate placements for each of the groups.