JP5042492B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5042492B2 JP5042492B2 JP2005365106A JP2005365106A JP5042492B2 JP 5042492 B2 JP5042492 B2 JP 5042492B2 JP 2005365106 A JP2005365106 A JP 2005365106A JP 2005365106 A JP2005365106 A JP 2005365106A JP 5042492 B2 JP5042492 B2 JP 5042492B2
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- H01L2924/30—Technical effects
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
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- Semiconductor Integrated Circuits (AREA)
Description
(1)本発明による半導体装置は、
第1導電型の半導体基板の主面にて、チャネル形成領域を挟んで互いに離間して形成された第2導電型のソース領域およびドレイン領域と、
前記チャネル形成領域上にゲート絶縁膜を介して形成されたゲート電極とを備えたLDMOSFETを有し、
前記半導体基板の裏面にソース裏面電極が形成され、
前記半導体基板中に、前記ソース領域と前記ソース裏面電極とを電気的に接続する、多結晶シリコンまたは金属を主成分とする第1導電層が形成され、
前記半導体基板の前記主面上に、前記ドレイン領域と電気的に接続する複数層のドレイン配線、および前記ソース領域と電気的に接続する1層以上のソース配線が形成され、
前記ドレイン配線の第1配線層数は、前記ソース配線の第2配線層数より多いものである。
(2)また、本発明による半導体装置は、
第1導電型の半導体基板の主面にて、チャネル形成領域を挟んで互いに離間して形成された第2導電型のソース領域およびドレイン領域と、
前記チャネル形成領域上にゲート絶縁膜を介して形成されたゲート電極とを備えたLDMOSFETを有し、
前記半導体基板の裏面にソース裏面電極が形成され、
前記半導体基板中に、前記ソース領域と前記ソース裏面電極とを電気的に接続する、多結晶シリコンまたは金属を主成分とする第1導電層が形成され、
前記半導体基板の前記主面において、前記ソース領域の表面にはシリコンと金属との化合物層が形成され、
前記半導体基板の前記主面において、前記ドレイン領域と電気的に接続するドレイン電極が形成され、
前記化合物層の鉛直上方には、前記ソース裏面電極と電気的に接続する第1配線は配置されていない。
(3)また、本発明による半導体装置は、
第1導電型の半導体基板の主面にて、チャネル形成領域を挟んで互いに離間して形成された第2導電型のソース領域およびドレイン領域と、
前記チャネル形成領域上にゲート絶縁膜を介して形成されたゲート電極とを備えたMOSFETを有し、
前記ドレインは、第2導電型のドレイン低濃度領域と、前記ドレイン低濃度領域と接し、かつ前記チャネル形成領域から離間して形成され、前記ドレイン低濃度領域より不純物濃度が高い第2導電型のドレイン高濃度領域とから形成され、
前記ドレイン低濃度領域は、平面で前記ゲート電極と前記ドレイン高濃度領域との間に配置され、
前記ドレイン高濃度領域は、平面で前記ゲート電極と離間して配置され、
前記半導体基板の裏面にソース裏面電極が形成され、
前記半導体基板中に、前記ソース領域と前記ソース裏面電極とを電気的に接続する、多結晶シリコンまたは金属を主成分とする第1導電層が形成され、
前記半導体基板の前記主面上に、前記ドレイン領域と電気的に接続する第1ドレイン電極と、前記ソース領域と電気的に接続する第1主面ソース電極と、前記ゲート電極、前記第1ドレイン電極および第1主面ソース電極を覆う層間絶縁膜が形成され、
前記層間絶縁膜上に、前記第1ドレイン電極と電気的に接続する第2ドレイン電極が形成され、
前記第2ドレイン電極が配置された配線層では、前記第1主面ソース電極の鉛直上方で前記第1主面ソース電極と電気的に接続する第2主面ソース電極は配置されていない。
本実施の形態1の半導体装置は、たとえばGSM方式のネットワークを利用して情報を伝送するデジタル携帯電話(移動体通信機器)に使用されるRF(Radio Frequency)パワーモジュールなどに搭載されるチップである。
図21は、本実施の形態2におけるチップCHP内の要部断面図を示したものである。
本実施の形態3は、前記実施の形態1、2で示したチップCHP内にLDMOSFET以外の素子も形成されている場合のものである。
2 エピタキシャル層
3 溝
4 p型打ち抜き層(第1導電層)
5 p型ウエル
6 ゲート絶縁膜
7 ゲート電極
8 キャップ絶縁膜
9 n−型オフセットドレイン領域(ドレイン低濃度領域)
10 n−型ソース領域
11 p型ハロー領域
12 サイドウォールスペーサ
13 n型オフセットドレイン領域(ドレイン高濃度領域)
15 n+型ドレイン領域(ドレイン高濃度領域)
16 n+型ソース領域
17 p+型半導体領域
20 窒化シリコン膜
21 酸化シリコン膜
22 コンタクトホール
23 プラグ(第1配線)
24A 配線(第1配線、第1主面ソース電極)
24B 配線(第1ドレイン電極)
24C 配線
24D シリサイド層(化合物層)
24E コバルト膜
24F 配線
24G 下部電極
26 酸化シリコン膜
26A 開口部
26B 容量絶縁膜
27 スルーホール
28 プラグ
29B 配線(第2ドレイン電極)
29C 配線
29D、29E 配線
29F 上部電極
30 酸化シリコン膜
31 スルーホール
32 プラグ
33 配線(第2ドレイン電極)
33A ドレインパッド(ドレイン電極)
34 酸化シリコン膜
35 窒化シリコン膜
36 ソース裏面電極
41 能動素子
42 容量
43 抵抗
101 基板
102 金属電極
103 ソース領域
104 打ち抜き層
104A 周辺打ち抜き層
105 ドレイン領域
106、107、108 配線(ドレイン配線)
109 ドレインパッド(ドレイン電極)
110 ゲート電極
111 ゲートパッド
112、113、114 配線(ソース配線)
113A 配線
AJC1、AJC2 整合回路
AMP1、AMP2 電力増幅回路
AMP11〜AMP13、AMP21〜AMP23 増幅段
BAC1、BAC2 バイアス回路
BIT1、BIT2 バイアス制御信号入力端子
BP1 ボンディングパッド
BW1 ボンディングワイヤ
C1、C2 寄生容量
C22 容量素子
CHP チップ
CND1 導体層
DEC1、DEC2 検出回路
DS 素子分離領域
ELB 裏面電極
GNDT 基準電位供給用端子
HL1 窪み
IL1 絶縁層
IPT1、IPT2 入力端子
L 活性領域
MB1 配線基板
MBB 下面
MBT 基板側端子
MBU 上面
MR1 封止樹脂
OCT 外部接続端子
OPT1〜OPT4 出力端子
PM RFパワーモジュール
PP1 受動部品
PSC1、PSC2 電源回路
R23 抵抗素子
RESI フォトレジスト膜
SD1 ショットキバリアダイオード素子
SLD、SLD2 はんだ
VH1、VHC ビアホール
Claims (7)
- 第1導電型の半導体基板の主面にて、チャネル形成領域を挟んで互いに離間して形成され、且つ、前記第1導電型と反対の導電型である第2導電型のソース領域およびドレイン領域と、
前記チャネル形成領域上にゲート絶縁膜を介して形成されたゲート電極とを備えたLDMOSFETを有する半導体装置であって、
前記半導体基板の裏面にソース裏面電極が形成されており、
前記半導体基板中に、前記チャネル形成領域および前記ソース裏面電極と電気的に接続し、且つ、多結晶シリコンまたは金属を主成分とする第1導電層が形成されており、
平面視において、前記ドレイン領域上には、前記ドレイン領域と電気的に接続する複数層のドレイン配線が形成されており、
平面視において、前記ソース領域上には、前記ソース領域および前記第1導電層と電気的に接続する1層のソース配線が形成され、且つ、前記ソース配線以外の配線が形成されておらず、
前記半導体基板の前記主面上に下部電極、容量絶縁膜および上部電極を備えた容量素子が形成されており、
前記下部電極は、前記ソース配線と同じ配線層にて形成されていることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記半導体基板の前記主面において、前記ソース領域の表面にはシリコンと金属との化合物層が形成されていることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記第1導電層は、第1導電型の不純物イオンが導入された前記多結晶シリコンが主成分であることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記第1導電層は、タングステンが主成分であることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記半導体基板上に、前記LDMOSFETを覆うように絶縁膜が形成されており、
前記絶縁膜中には、第1プラグおよび第2プラグが形成されており、
前記第1プラグは、前記ソース配線と前記ソース領域とを接続しており、
前記第2プラグは、前記ソース配線と前記第1導電層とを接続していることを特徴とする半導体装置。 - 請求項1記載の半導体装置において、
前記ソース配線は、前記複数層のドレイン配線のうち最下層の配線と同層に形成されていることを特徴とする半導体装置。 - 請求項6記載の半導体装置において、
前記ソース配線の膜厚と、前記最下層の配線の膜厚は、前記最下層の配線よりも上層の配線の膜厚よりも薄いことを特徴とする半導体装置。
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