公开(公告)号：US09940422B2

公开(公告)日：2018-04-10

申请号：US14743099

申请日：2015-06-18

Applicant: MediaTek Inc.

Inventor： Chin-Hsiung Hsu ,  Chun-Chih Yang

IPC: G06F17/50 ,  H03K19/177

CPC classification number: G06F17/5072 ,  G06F17/50 ,  G06F17/5054 ,  G06F17/5077 ,  G06F17/5081 ,  G06F2217/08 ,  G06F2217/78 ,  H03K19/17728 ,  H03K19/17736 ,  H03K19/17756 ,  H03K19/17796

Abstract: A method for reducing congestion regions of an integrated circuit is provided. A placement of the IC is obtained, wherein the placement includes a signal path between a first macro module and a second macro module. The signal path passes through a routing area of the placement for transmitting a specific signal. A congestion region of the routing area is identified. The signal path includes at least one cell or routing path in the congestion region. A cost evaluation is obtained for each candidate position of the routing area by moving the cell or the routing path out of the congestion region. The cell is moved to the candidate position having a minimum cost evaluation among the cost evaluations. The placement and the routing paths are simultaneously updated according to the cell moved to the candidate position having the minimum cost evaluation.

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：US09817936B2

公开(公告)日：2017-11-14

申请号：US14741771

申请日：2015-06-17

Applicant: MediaTek Inc.

Inventor： Chin-Hsiung Hsu ,  Chun-Chih Yang

IPC: G06F17/50

CPC classification number: G06F17/5072 ,  G06F17/5077 ,  G06F2217/08

Abstract: A method for minimizing layout area of IC is provided. A plurality of first tiles of an initial floor plan are obtained according to a plurality of partitions and channels of the initial floor plan. Each first tile between the partition and the channel has a fixed tile property being the partition or the channel. Each second tile between at least one of the partitions and at least one of the channels has a changeable tile property which can be changed between the at least one partition and the at least one channel. A specific area path of the layout area is obtained according to the partitions, the channels and the routing densities corresponding to the channels. The changeable tile properties of the second tiles are changed according to the specific area path, to re-shape the partitions and re-route the nets within the channels.

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.