公开(公告)号：US20240404928A1

公开(公告)日：2024-12-05

申请号：US18678270

申请日：2024-05-30

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Masahiro NAGATA ,  Kazuhiro SHINOZAKI ,  Masahiro YAMADA ,  Daisuke OKUYAMA ,  Chiaki HATSUTA ,  Kentarou SEKI ,  Hideto MATSUI ,  Kazunori OOUCHI

IPC: H01L23/495 ,  C23C18/22 ,  H01L21/48 ,  H01L23/00 ,  H01L23/31

Abstract: A lead frame includes a plurality of lead portions. At least a part of an upper surface of the lead portion and a sidewall surface of the lead portion is a rough surface having been subjected to roughening treatment. A value of a* in a CIELab color space of the rough surface is within a range from 12 to 19, and a value of b* is within a range from 12 to 17.

公开(公告)号：US20240145356A1

公开(公告)日：2024-05-02

申请号：US18279608

申请日：2022-09-01

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Masahiro NAGATA ,  Kazuhiro SHINOZAKI ,  Masahiro YAMADA ,  Daisuke OKUYAMA ,  Chiaki HATSUTA ,  Kentarou SEKI ,  Hideto MATSUI ,  Kazunori OOUCHI

IPC: H01L23/495 ,  H01L21/48

CPC classification number: H01L23/49582 ,  H01L21/4842 ,  H01L23/49513 ,  H01L24/48 ,  H01L2224/48245

Abstract: A lead frame includes a plurality of lead portions. At least a part of an upper surface of the lead portion and a sidewall surface of the lead portion is a rough surface having been subjected to roughening treatment. A value of a* in a CIELab color space of the rough surface is within a range from 12 to 19, and a value of b* is within a range from 12 to 17.

公开(公告)号：US20240030114A1

公开(公告)日：2024-01-25

申请号：US18375193

申请日：2023-09-29

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Masahiro NAGATA ,  Kazuhiro SHINOZAKI ,  Masahiro YAMADA ,  Daisuke OKUYAMA ,  Chiaki HATSUTA ,  Kentarou SEKI ,  Hideto MATSUI ,  Kazunori OOUCHI

IPC: H01L23/495 ,  H01L21/48

CPC classification number: H01L23/49582 ,  H01L21/4828

Abstract: A lead frame includes a plurality of lead portions. At least a part of an upper surface of the lead portion and a sidewall surface of the lead portion is a rough surface having been subjected to roughening treatment. A value of a* in a CIELab color space of the rough surface is within a range from 12 to 19, and a value of b* is within a range from 12 to 17.